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2,3-butanediol in Wine July 14 - 02:51 pm

Not able to separate 3 pesticide Peaks July 9 - 08:15 am

Derivatization August 25 - 09:42 am

2,3-butanediol August 31 - 03:14 am

Quantifying acetonitrile, acetamide and acetic acid September 15 - 08:37 am

Cyanocarbamic acid methyl ester September 5 - 12:23 am

Acetic Acid Assay October 20 - 05:03 am

GC: Carryover from previous sample June 24 - 03:47 pm

Acetylene tail September 25 - 08:03 am

Beta emitting radioisotope GC flow detector query June 3 - 06:07 am

Urgent help needed in thiamin analysis using GC!!!!!!!! June 3 - 10:16 am

Sine wave in GC baseline October 5 - 09:38 pm

Herbicide Analysis July 15 - 04:13 pm

Analyzing cell culture media for monoethanolamine June 23 - 12:58 pm

CARRIER GAS October 5 - 09:46 pm

Derivatives June 30 - 07:12 am

Hydrogen carrier with ECD September 8 - 06:15 pm

Cholesterol analysis September 28 - 02:44 pm

GC Carrier Gas Flow Rate & Resolution July 19 - 06:16 pm

Hydrogen generators July 16 - 07:04 am

Small process gas chromatographs September 11 - 05:38 pm

Varying MTBE responses using Purge and Trap August 3 - 08:11 am

System Suitability for NF Nitrogen Gas July 18 - 08:38 pm

Injection Port August 7 - 07:43 am

LIQUID CARBON DIOXIDE ANALYSIS FOR BENZENE AT PPB LEVEL September 11 - 05:56 pm

GC method for Chloral hydrate? September 14 - 10:55 am

BASELINE PROBLEM August 15 - 07:20 am

Problems with benzene on a P.I.D. Detector August 30 - 06:19 pm

Recondition GC injector liners September 24 - 07:27 pm

Measuring the flow rate September 24 - 07:12 pm

Identical columns with dual TCD September 5 - 12:51 am

2,3-butanediol October 4 - 02:28 am

Cleaning syringes September 22 - 01:15 pm

Relative V Absolute Recovery September 22 - 07:20 pm

Tertiary amines October 14 - 06:46 am

What is GC capillary column CBP-1? September 16 - 07:44 am

Analytical standards October 6 - 06:55 am

GC - natural gas- calibration October 7 - 09:51 pm

Toluene co-elution. November 9 - 04:25 am

GC for chloroaniline November 30 - 05:51 pm

FID response - use of carbon factors October 21 - 08:58 am

C6,C7,C8 natural gas isomers October 15 - 11:30 am

Pesticides and PCBs analyses December 15 - 03:28 am

GC problems when injecting tertiary amines October 25 - 01:20 pm

Enquiry about the anlytical procedure for CFCs dissoved in groundwater November 24 - 08:43 pm

New to GC June 25 - 01:08 am

VFA Analysis Gone Negative November 9 - 06:19 am

Halogen containing contaminant in hexane November 1 - 10:58 am

Use of KCl to increase HS-GC Detection Limits November 2 - 01:56 pm

Usage of GC November 11 - 10:05 am

What can I do to improve the quality of this peak? November 11 - 01:33 pm

Instrument calibration for method validation November 12 - 01:18 pm

Portable GC units for field analysis of methane November 24 - 07:57 pm

Valproic Acid screening November 22 - 08:54 am

Calibration question November 24 - 07:40 pm

Alternate Method for Haloacetic Acids analysis November 23 - 09:09 am

GC Columns?? November 26 - 11:03 am

Basic GC reference needed December 3 - 06:35 pm

How to analyse sodium acetate using GC? December 27 - 05:13 am

Suggestions for a New GC December 7 - 07:35 am

Plate height and Plate number.. December 30 - 10:14 pm

Baseline Problems With ECD on Varian GC December 7 - 07:53 am

Optimisation of a Methaniser for CO2 quantitation December 18 - 11:05 pm

How to analyse aflatoxins B1 in mice body using GC ? December 28 - 05:54 am

Inorganic salts in gc columns September 27 - 02:55 am

Herbicide Analysis July 19 - 06:07 pm

HP6890 & Turbochrom Problem February 5 - 12:44 am

Acetic Anhydride January 15 - 10:12 pm

HELP *urgent* Separation of tar/nicotine from cigarettes January 31 - 05:09 am

TBT (Tributyltin) determination in textiles April 16 - 10:05 am

Alpha hydroxy acids January 6 - 10:53 am

Help: accurate measuring of nicotine and tar in cigarettes January 14 - 06:48 pm

Selective Enrichment of PAH�s February 11 - 12:59 am

Separation of Polydimethylsiloxane (PDMS) March 16 - 12:58 pm

Natural gas analysis January 24 - 05:53 am

Cigarette Smoke-HCN January 4 - 05:48 am

Alpha hydroxy acids January 31 - 12:53 pm

Help w/ Sigma 300 (again) January 11 - 02:35 pm

Thiram(TMTD) March 15 - 05:24 am

Trouble with de detector signal. January 26 - 05:53 am

ECD linearity Problem February 4 - 09:37 am

To prove the degradation problem of Nitro-PAH in using split mode in GC separation February 9 - 09:12 pm

On-colulmn injectors February 11 - 12:11 pm

Signal to Noise Ratio: MDL, LOQ February 18 - 07:59 am

CO and CO2 at ppm level February 20 - 10:32 pm

Shot TCD February 26 - 02:03 pm

Moisture content of sample April 27 - 08:37 am

Derivatisation of carbonyl compounds May 23 - 09:02 am

Analysis of azodyes with GC March 14 - 06:18 am

Varying peak areas between replicates April 5 - 04:27 pm

Assay for Propyleneglycol monolaurate March 28 - 04:56 am

Wot no GC Equipment Validation? February 14 - 09:23 am

New O-FID for Gasoline March 17 - 09:11 am

DS 600 (Varian) March 10 - 05:03 am

Detection of water with FID Detector July 7 - 03:12 pm

Which GC? March 20 - 10:11 am

Analysis of Hydrazine compund type March 21 - 10:25 pm

Analyse protected pyranose March 27 - 04:20 pm

Can you use mean RSD for 8260/8270 initial calibration? March 30 - 12:10 pm

TCD response factor April 4 - 07:46 am

What should I use in my rinse vials? April 6 - 08:41 am

Herbicide Analysis: Poor Recovery on Dinoseb April 27 - 12:08 pm

Chromatography data systems April 18 - 01:57 pm

Packed columns with HP6890 April 19 - 06:30 am

Fatty acid recovery and internal standard May 20 - 08:32 am

%recovery of fatty acid May 20 - 08:46 am

Peak area ratio variability with on-column injector April 30 - 02:21 am

SOP for HP-6890 GC April 30 - 02:26 am

HT-5 and rising baselines and integration May 16 - 11:56 am

SPME Quantification February 28 - 09:48 am

Can someone help? March 22 - 04:02 am

Acetic Acid by Capillary GC July 25 - 09:59 am

Propylene oxide methods January 7 - 03:13 am

Methylation of sec. amine January 29 - 05:00 pm

GC of natural gas December 20 - 08:41 am

(-)-menthyl acetate detection July 20 - 05:13 am

USP organic volatile impurities January 30 - 02:37 am

Organotin compounds May 8 - 08:08 am

Electronic Flow Splitter May 17 - 09:02 am

Installed GC population in England May 22 - 05:28 am

Properties of polysiloxane May 22 - 02:03 pm

Help! European/British Pharmacopoeia GC method for impurities in Ethanol June 10 - 06:10 pm

Benzyl alcohol contamination July 28 - 06:14 am

GC Column Optimization Stratagies October 4 - 01:07 pm

Surrogate Recovery Problems with EPA 524.2 VOC's June 19 - 09:26 am

Calibration of GC Oven Thermocouple June 27 - 02:31 am

ASTM METHODS OF THE ANALYSIS OF CRUDE BY GC June 24 - 10:56 pm

STATIONARY PHASES OF ANALYSIS OF CRUDE &PETROLEUM PRODUCTS OF BOTH COLUMN CAPILLARY & PACKED November 2 - 05:38 pm

Manual injection techniques June 28 - 08:36 pm

Using Kovat's Indices in routin GC- measurement October 9 - 08:07 am

Analysis of Trifluoroacetic acid June 29 - 12:29 am

Refurbishing NPD Collector Funnels July 12 - 11:19 am

THE USE OF FUSE SILICA &POLYMIDE COATING IN THE CAPILLARY COLUMN June 28 - 10:24 pm

Oxindole detection by GC July 6 - 09:50 pm

ECD-detection July 5 - 07:46 am

Internal standard for GC for analysing lactate July 7 - 06:15 am

Anyone use thermal desorption for Occupational Exposure monitoring July 27 - 04:24 am

Whatman gas generator electolyte solution November 9 - 06:03 am

Gas chromatography testing at an arson scene July 26 - 08:27 am

NPD Detector November 20 - 01:34 am

Pulsed Discharge Detector January 26 - 05:49 pm

FAST GC - MICROBORE COLUMNS August 1 - 07:55 am

How to do the determination of epichlorohydrine and acrylamide? July 24 - 05:54 am

Gc analysis of sugar phosphates July 24 - 05:33 am

Cryogenic modulation in GC July 25 - 12:12 am

Residual solvents in printed films July 31 - 07:42 am

Analysis of C6+ in ppm range in high pressure natural gas August 3 - 08:49 am

Electronic nose for ID purposes ? August 4 - 05:23 am

Micro GC - who can give me the info? April 27 - 01:14 pm

Halogenated pyridines atmosphere analysis August 15 - 01:05 am

Measure ppm water content in hydrocarbon mixture by GC? April 24 - 05:18 pm

GC of sugar phosphates and nucleotides (Help!!!! September 7 - 11:15 am

Residual Trifluoroacetic Acid in a Diacid Compound January 9 - 05:00 pm

Standards for thermal desorption. August 31 - 04:40 am

Audit procedure for GC March 27 - 07:20 pm

ECD response problems September 7 - 11:08 am

Raw material testing September 19 - 12:33 pm

Software to display HP5890 archived data September 21 - 07:49 am

REMOVING COMPRESSOR OILS FROM RECOVERED REFRIGERANTS September 27 - 05:39 pm

Temperature of column and effects September 27 - 05:34 pm

GC IQ/OQ/PQ Protocol October 13 - 01:29 pm

GC analysis of benzoic acid anhydrid January 16 - 08:10 am

Determination of (S)-metolachlor and metholachlor October 20 - 05:11 am

Headspace or Purge and Trap October 27 - 07:59 am

Relative response factors for HC's using GC-FID April 24 - 05:21 pm

How do I get rid of bad reproducibility of the first peaks in my chromatogram ? October 27 - 01:26 am

Turbochrom October 27 - 09:48 am

Conversion of area count units October 27 - 07:35 am

The help! The analysis of acetylene in ethene November 24 - 07:06 am

GC analysis of acetone in water concentrate November 18 - 06:03 am

Change in Retention Time June 4 - 08:44 pm

Reduction of time of the analysis of oils October 28 - 09:19 pm

Temperature Verification of Injector/Detector November 7 - 09:22 am

Minimization of Water Peak? October 31 - 07:45 pm

Injection of BSTFA November 10 - 02:32 pm

Where can I find parts for a HP7673A GC Auto Sampler? November 16 - 10:53 am

Split vs Splitless Injections November 24 - 06:39 am

Capillary colimn identification November 15 - 06:24 am

Procedure for verifying Injector/Detector temps November 20 - 12:55 am

Diacetyl (2-3 butanedione) analysis by gc June 7 - 10:58 pm

TCLP Analysis of Herbicides December 1 - 04:02 am

NuGenesis Pricing November 30 - 10:39 am

Transesterification with TMSH December 1 - 08:16 am

Comments on Off-Duty Columns by John V.Hinshaw, LC-GC Europe, nov.2000 December 19 - 08:39 pm

Old GC stationary phase January 5 - 03:51 am

Large Volume Injections December 13 - 10:59 am

Trichloroacetic Anhydrid December 12 - 05:15 am

Programmed Temperature Vaporizer December 13 - 09:03 am

Raising baseline with HP GC-FID December 18 - 10:10 am

GC analysis of solvent in low MW polymer December 16 - 11:47 am

Tributyl tin proficiency test December 19 - 05:55 am

Arnel Chromatography Solutions for Carbon Dioxide, Sulfurs, Refinery and Natural Gas September 12 - 11:05 pm

1/16" Micropacked columns NGA September 12 - 11:03 pm

On-Column Injections September 12 - 01:59 pm

Chromatography of polyols September 12 - 01:58 pm

Matrix problem during NH4 analysis! March 21 - 12:03 pm

Unknowns in Butane Stream August 16 - 09:04 am

Gas generators June 3 - 04:14 am

Looking for column to separate H2O, acetone, isopropyl alcohol May 2 - 08:10 am

Problems with ECD response June 10 - 11:31 am

Question about an FID January 23 - 04:49 am

Continually changing retention times January 18 - 05:45 am

Analysis of Phenols in Water February 28 - 03:28 am

Parts for hp pascal station June 8 - 12:33 pm

Manual integration February 1 - 09:31 am

GC Analysis of MTBE April 30 - 05:26 pm

CLASS-VP 4.3 Chromatography Software November 16 - 11:26 pm

FID vs. TC June 5 - 06:18 am

7673A Injector Module Problems March 27 - 07:46 am

Ammonia Gas February 14 - 08:42 pm

Gas Generators January 2 - 08:29 am

Trio 1000 with Lab-Base 2.13 January 10 - 11:14 am

Error message on turbochrom with PE autosystem January 17 - 02:12 am

Poor Reproducibility January 16 - 11:57 am

Breaking Tubes in Antek Sulphur Detector January 13 - 01:00 pm

GC of elemental halogens January 15 - 08:02 am

Capillary Column Protection & Regeneration January 18 - 08:45 pm

PE Autosystem XL with sampler requirement January 19 - 02:27 am

Gas chromatography June 7 - 09:48 am

Gas generators February 9 - 01:45 pm

Using TMSH to produce FAMEs January 25 - 07:50 am

Shifting RTs February 2 - 08:03 am

Mdl for epa method 504.1 February 1 - 08:15 pm

Ethanol in beer-method and sample preparation-who helps? February 8 - 08:42 am

Bending Needles May 16 - 08:52 am

Setting GC acquisition rate? May 4 - 07:03 am

Review of Perkin Elmer G.C February 14 - 11:02 am

GC: chiral alcohols: enantiomer assignation February 13 - 06:21 am

Injection solvent effect February 27 - 08:20 am

Modification of chrompack gc model 438 A February 14 - 01:06 am

HYDROGEN AS A CARRIER GAS? April 24 - 05:31 pm

Fatty acid analysis + SPE May 22 - 07:38 am

Peak splitting in SIM mode February 27 - 11:46 pm

Flavor analysis in dairy product February 22 - 01:43 am

Internal Standards for GC Analyses June 21 - 09:07 am

Heat traced tubing for sampling valve June 21 - 05:42 am

Diffrent retentiontime PE-ATD400 March 1 - 12:30 am

Test tube quality February 26 - 09:08 am

Chrompac AlO2/KCl, New tecnology??? May 18 - 07:40 am

Gas Chromatograph Report March 20 - 07:40 am

Maleic anhydride determination March 20 - 01:01 am

Esterification: Fatty Acid Methyl Esters March 12 - 02:01 pm

EP requirement for Nitrogen March 9 - 05:29 am

Measuring thyroid hormones March 10 - 09:25 am

Open tubular columns preparation March 13 - 11:49 am

Methods for sulphonated terpenes by GC needed April 21 - 05:15 pm

Traps? June 8 - 12:39 pm

EPA Method 525.2 loss of d12-Perylene during extraction March 17 - 07:19 am

PE PerVent April 27 - 12:56 pm

FID detector noise "jitter" April 25 - 08:37 pm

GC/FID...GASES...INTERNAL STANDARDS.....ETC.......HELP!!! April 3 - 08:03 am

Damaged column May 15 - 12:47 pm

Detection of Maleic Anhydride with P&T-GC March 25 - 09:47 am

How to calibrate C2-C6 with a standard mixture gas April 18 - 11:41 am

PCBs Determination by GC April 11 - 04:44 am

Detection limit for methylene chloride on GC-ECD April 3 - 01:11 am

TCD HELP April 18 - 11:47 am

Analysis of organic solvents in air April 5 - 04:03 am

GC analysis of Volatile fatty acids April 5 - 08:10 am

Silylation method for Di-Isopropyl Amine and it's deviatives April 26 - 06:49 am

Bisphenole A May 1 - 10:53 pm

GC for Salmeterol April 13 - 10:05 am

Old PE GC Parts source April 18 - 11:55 am

HS-GC and Method validation April 20 - 10:43 am

PID Noise April 25 - 02:15 pm

Trace organic contamination in H2O2 April 23 - 01:14 pm

GC-FID calibration in air or product matrix? April 25 - 05:06 am

Preperative GC Seperations April 27 - 02:55 am

Changing columns without venting May 26 - 12:42 pm

Volatile organic compunds with small amounts of Hydrochloric Acid May 14 - 08:33 am

Analysis of H2, O2, CO2 and H2S June 17 - 09:21 pm

Reproducibility with manual injections May 17 - 11:43 am

Helium concentration determination February 14 - 08:20 pm

Dual chanel analysis (2 different detectors) June 15 - 12:49 pm

Tips for Silylation and Methylation: Easy Methods and Artifacts formed May 23 - 05:26 pm

Temperature effects on PAHs May 28 - 11:38 pm

Oildetection May 25 - 08:22 am

Neon in gas mixture June 7 - 08:11 am

HEAD SPACE GC vs. REGULAR GC?????? June 11 - 11:12 am

HP-FPD Photomultiplier lifetime? June 29 - 03:27 am

Loss of resolution of later eluting peaks January 11 - 08:02 pm

Measure phenol in water where the ratio is 75:25 February 15 - 09:23 am

Sepration science in "chromatography" ON GAS CHROMATOGRAPHY February 26 - 02:32 pm

Inherited problem.....suggestions please! April 27 - 10:46 am

Method Transfer from HP to PE system. January 16 - 08:04 am

European pharmacopeia assay for nitrogen July 27 - 01:45 am

How good is Agilent's NPD bead ( GC 6890)? July 12 - 06:58 am

Trying to see PCB's Through Freon July 16 - 01:27 pm

Ethylene oxide July 10 - 12:27 pm

LogP values for capillary GC phases. July 6 - 04:28 am

Ethyl-derivatives (Diazoethane) July 9 - 12:06 am

GC instrument July 17 - 05:55 am

Looking For GC Capillary column for analysis of ethanol in pharmaceuticals July 10 - 08:35 am

Optima Delta Phases and Colums (Macherey-Nagel) August 9 - 07:16 am

Separation argon with nitrogen mixtures, problem with reproducibility. August 2 - 09:58 am

Quantification of Hydrogen in the presence of hydrocarbons August 13 - 08:13 am

Filament lifetimes August 3 - 01:26 pm

Comments are needed for buying a GC August 8 - 08:39 am

Hydrogen Detection on TCD August 10 - 10:59 am

Inverse Gas Chromatography August 8 - 08:44 am

Argon Ionisation Detector August 9 - 11:45 pm

Ester acid August 15 - 07:32 am

Coffee Headspace GC August 17 - 11:39 am

PDD Pulsed Discharge detectors August 21 - 10:47 am

Adipic Acid Analysis August 27 - 10:21 am

Chlorotrim�thylsilane (TMSCl) June 14 - 02:04 am

GC analysis of mixture of formamide, hydrogen cyanide, ammonia and carbon monoxide! August 23 - 08:35 am

Distinguishing gasoline from different manufacturers using GC /LC December 3 - 05:27 pm

Glucose penta-acetate and derivatives December 10 - 11:51 am

Headspace GC December 21 - 08:12 am

Problems with PCBs standards using ECD-GC December 21 - 12:48 pm

System Suitablity December 27 - 11:10 pm

GC VALVES/FLOW-CONTROLLERS November 27 - 07:15 am

Packed Columns and the USP December 26 - 07:26 am

Trifluoroacetyl Chloride by GC November 5 - 06:45 am

Atrazine response reproducibility problem October 23 - 02:49 am

Triethyl Citrate November 2 - 05:41 am

Headspace and splitless injections September 10 - 09:22 am

GC literature November 13 - 01:29 pm

Trihalomethanes on ECD December 20 - 01:42 am

Analysis of pesticides residus in vegetables 90% wet September 10 - 12:02 am

Residual Solvents by HS-GC November 5 - 06:38 am

ASE sample preparation with SFE instrument? October 31 - 10:55 am

Theory of Headspace: new approach and results October 31 - 09:10 am

Methyltetrahidrofuran as residual solvent October 31 - 12:07 pm

Poor reproducibility probably due to flashback May 26 - 04:06 am

Gc-fid recovery of acetone using standard addition November 5 - 06:27 am

Peak tailing of methyl ester November 9 - 05:21 am

GC method for Nitrous Oxide November 8 - 06:17 am

Typical sensitivity for pesticides of FPD detector November 14 - 03:42 pm

TCD condensation November 13 - 08:03 am

Benzyliodide November 16 - 06:18 am

Internal standard for GC-FID November 20 - 05:46 pm

Diethyleneglycol in wine November 26 - 08:22 am

GC Analysis of hydrogenated Castor Oil November 28 - 01:32 pm

Chlorofluorosilanes November 29 - 10:40 am

Liquid desorption December 10 - 01:42 pm

Information Request: Flow and Pressure Control December 14 - 06:33 am

How to do ovi validation in gchs have any website for this? August 6 - 01:33 pm

Rugged baselines August 24 - 07:56 am

Chromabarography - A new technology in chromatography December 13 - 02:42 am

Methode n-methl-2-pyrrolidone November 22 - 11:50 pm

1 butyl 3 methyl imidazole in water May 2 - 11:44 am

Increasing response June 19 - 01:44 am

Hydrocarbon analysis March 30 - 11:43 am

GC carry over or anything else? January 2 - 03:20 pm

Jade Septumless Inlet January 14 - 09:34 am

GC question May 18 - 07:54 am

P5 vs N2 for ECDs December 21 - 12:58 pm

Analyzing thiols-disulfides May 31 - 10:02 am

Splitless Mode Flow January 18 - 07:04 am

FID Baseline Drops January 16 - 12:02 am

Need direction on shorting up runs. January 17 - 01:04 pm

What is the optimum flowrate for the column used(1.7m)? January 29 - 09:03 am

Hicap CBP-1 GC-Column? January 25 - 07:50 am

Probleam with gchs analysis of acetic acid and triethylamine February 18 - 05:45 am

Output Scaling January 25 - 12:18 pm

Constant Flow Mode vs. Constant Pressure Mode February 1 - 03:43 pm

Chemstation Issue May 30 - 03:34 pm

Do I have a problem with my split vent? May 20 - 05:05 pm

Measurement of gas component by GC March 12 - 05:27 am

Quantify by capillary column February 14 - 12:56 pm

Is there a substitute for HP autosampler (GC 5890)? May 27 - 01:45 am

Prediction elution program February 15 - 08:43 am

Please help me in my GC technical problems March 9 - 08:12 am

Pls. check my method for preparation of std. gas and advice me February 22 - 10:35 am

Chiral GC resources February 25 - 08:48 am

TEA / IPA separation March 5 - 11:28 am

Determination of ammonia April 1 - 10:05 am

Technical problem in HP 6890 March 9 - 11:16 am

Requirements for Fast GC March 8 - 02:38 pm

Is there a required gas purity for proper PFPD use? April 9 - 07:32 am

Inline GC sampling March 25 - 01:15 pm

Plunger in needle syringes March 15 - 07:36 am

FID Ignition April 22 - 08:25 am

GC Instrument Validation April 16 - 06:28 am

Can GC be used to identify/quantify oxygen evolution? May 15 - 07:28 pm

Sample Injection via valve onto capillary column April 5 - 09:32 am

Instrument LODs and Septa - Environmental Testing April 5 - 03:41 pm

TCD problems April 8 - 08:10 am

Hexafluropropene GC methods April 16 - 08:14 am

SPME calibration of ethyl esters May 25 - 07:29 am

Please help with a GC programm April 19 - 04:25 am

Natural Gas Analysis-capillary column April 17 - 08:48 pm

FAtty acid analysis May 12 - 03:02 pm

GC Retention Times and Electro-static Fields April 25 - 04:44 am

Phthalates determination May 1 - 11:35 am

THM quantitative measurements April 30 - 04:26 am

GC contamination on Agilent 6890 May 31 - 10:54 am

Detecting microgram quantities of 3-dimethyl-1-phenyl-2-butanone using chromatography May 5 - 10:47 am

Chloroform analysis by HS-GC May 7 - 05:39 am

Large volume of thermoquest May 7 - 06:11 am

I need someone's help.. about GC and noble gas.. May 8 - 08:22 am

Your opinion about PE autosystem XL May 20 - 01:25 am

Dissolved gas extraction May 27 - 07:19 am

I have another question about GC conditions for the analysis of the noble gas. May 16 - 08:42 am

Analysis of oil tranformer dissolved gas June 11 - 12:09 pm

Headspace GC Question May 29 - 02:15 am

GC for isothiocyanates May 30 - 10:53 pm

Help NH3 gaseous analysis May 21 - 01:08 pm

Organic sulfurs in refrigerant gases - any methods available? June 6 - 02:23 am

Repeatability between ratios of alcohols with internal std. June 5 - 02:26 pm

Water by GC -TCD -offcial methodology? June 5 - 01:24 pm

FAME RECOVERY June 6 - 08:46 am

Enantiomeric Separation of BOC-protected Amino Acids June 11 - 05:09 am

Effect of Methane on Sulfide Analysis using a FPD June 10 - 11:35 am

Standard curve calculations June 13 - 09:03 am

TCD and ACIDS June 14 - 03:17 pm

Determination of water (moisture) June 20 - 01:24 pm

Column packing types June 25 - 05:16 am

GC method June 26 - 10:59 am

PAHs from hot gaseous fuel oil combustion products June 26 - 02:38 am

Presentation of a new quality of chromatography April 3 - 01:35 am

Liquid crystalline gc columns June 6 - 01:56 am

Looking for an average behavior (if possible) March 19 - 01:04 pm

Help Locating Part February 7 - 12:54 pm

Exchange for Serdoxit June 12 - 07:54 am

Curiosity killed the cat etc April 10 - 07:27 am

GS Repairs April 30 - 02:05 pm

VB ActiveX Library to Read/Manipulate AIA /ANDI Files January 31 - 10:54 am

MS Access/ Visual Basic/ Specialized software services offered.... February 2 - 09:05 am

ActiveX Object for CP Spirit, EZChrom Elite and AIA/ANDI GC Files February 13 - 03:18 pm

Retention index database for wax col. February 23 - 06:58 am

Can gasoline be distinguised by different mnufacturers using GC? August 26 - 05:42 pm

OI-Instruments PFPD August 12 - 07:40 am

Need IQ/OQ for headspace August 16 - 10:39 pm

Plot Q column regeneration and Detection Limit Calculation July 2 - 10:16 am

Help me in info on problems and troubleshooting of GC.. July 8 - 12:15 pm

Residual solvents analysis of chloro compounds July 15 - 08:44 am

GC- Method July 16 - 12:38 am

GAS analysis July 16 - 05:10 am

Spike sample with organic and less was detected? July 19 - 07:37 am

Co - Eluting Sulfur Compounds July 31 - 12:18 pm

Help on HUGE solvent peaks! July 24 - 12:30 pm

Small Difference in Signal Reponse on Multiple ECD's July 23 - 08:21 am

ECD Analysis of Nitrous Oxide July 23 - 04:27 pm

Capsaicin July 31 - 11:51 pm

Abnormal response on standard and samples August 13 - 02:54 pm

Determination of Methansulfonic acid alkylester July 27 - 03:37 am

Sample preparation using trichloroacetic acid August 13 - 08:11 am

Haysep column August 1 - 12:33 am

Residual Solvents in Pharmaceuticals: NMP - HS or Split? August 5 - 07:53 am

Water determination at low levels (10-20 ppm) August 6 - 02:35 pm

HI 1200 upgrade for the 7673 ALS August 14 - 05:50 am

Fatty acid analysis: contamination with palmitic acid August 28 - 06:10 am

Modification of Applied Automation's Optichrome GC August 22 - 03:30 pm

Headspace Transfer Line and Loop Temperature August 26 - 11:17 am

Acetic acid estimation by residual solvents analysis June 9 - 07:29 pm

Amylene content (stabiliser) in Methylene chloride August 28 - 10:34 am

Cyclic noise/baseline pattern August 30 - 06:45 pm

PORTABLE VOLATILES GC March 14 - 12:19 pm

Problems with solvent in aa analysis September 6 - 08:47 am

Assay residual process solvent September 9 - 01:01 pm

Column failure with ammonium acetate-methanol system December 4 - 12:30 pm

GC Calibration May 11 - 02:51 am

Manual for HP 7673 rs-232 communication board December 1 - 07:52 pm

Determination of dissolved ethylene in toluene December 19 - 06:25 am

Peak height vs. peak area December 3 - 12:11 pm

Column Compensation for HP 6890 December 17 - 02:33 am

Assay residual process solvent September 9 - 01:44 pm

Calibration for residual solvents analysis September 18 - 02:06 am

Trimethylsilyl derivates and column September 17 - 09:11 am

Area variation in splitless injection September 19 - 08:56 am

Halogenated Acetic Acid Analysis September 19 - 11:27 am

Inverse Gas Chromatography October 1 - 03:52 am

Injection carryover with Agilent autosampler October 3 - 02:51 am

Bad resolution with automatic headspace gas chromatography October 1 - 01:58 am

Bad resolution with HS-GC (Chromatograms attached) October 2 - 01:40 am

Response Factors!! October 13 - 04:59 pm

Bad reproducibility October 2 - 09:39 am

Residue analysis problem; DDT transformation to DDD October 3 - 09:10 am

Reducing Split Flow vs. Splitless Injection November 5 - 05:40 am

Analysis of Cis(-) isomer of Sertraline Hydrochloride by GC October 19 - 04:05 am

Gaschromatographich peak integration software October 15 - 12:22 am

Purge and Trap accessory October 7 - 11:00 am

Trap in injector October 10 - 01:45 pm

Response factors for linear primary alcohols October 13 - 04:50 pm

Phenylboronic acid derivatization October 12 - 02:47 am

Autosampler for static headspace GC: loop or syringe system? October 18 - 04:44 am

DIMETHYLSULPHOXIDE October 24 - 02:14 am

Hydrogen generators. October 28 - 11:42 pm

Hp repair October 24 - 08:05 am

Invite any Help about Methylene Cloride and Hexene November 5 - 05:35 am

Hp5890-error 8112 November 8 - 10:50 am

Looking for a USP Method for Ethanol October 24 - 10:43 am

GC HP69890 and Headspace sampler HP7694 Qualification? June 23 - 07:22 am

Merlin Microseal October 24 - 12:17 pm

Peak distortion in DB-17MS column October 25 - 11:58 pm

We need source alghorytms software for GC Peak integration October 30 - 09:00 am

Temperature programming for hydrocarbons November 3 - 12:04 pm

Hydrogen detection on TCD November 5 - 02:53 am

Varian 1400 series October 31 - 05:37 am

Amine salt by GC November 1 - 12:58 pm

GC method June 18 - 04:29 am

Looking for coupler for connecting GC columns November 14 - 09:27 am

Uninterruptible power supplies (UPS) November 13 - 07:35 am

Why do retention times of isomers correlate with their boiling points? November 15 - 07:18 am

FID jets November 20 - 01:33 pm

Derivitazation of glycosides in aqueous soln. November 19 - 11:04 am

Alkyl Nitrates in Bio Diesel November 22 - 08:15 am

Method for residual Dimethylsulphate November 20 - 11:28 am

Refinery gas analyzer (RGA) linearity November 22 - 05:56 am

Pyrojector II November 22 - 02:07 am

Acetic acid tail in FFAP column November 29 - 01:45 am

Spare parts of a HP5890 December 3 - 12:02 pm

Loadability of GC-columns December 3 - 11:29 am

Poor Injection Repeatability December 4 - 10:56 am

200 series gas chromatograph - Superb December 6 - 06:14 am

GC detectors "concentration and mass sensitive" December 13 - 07:14 am

Non linear but exponential calibration December 21 - 02:28 am

Bases in GC analysis solution. December 13 - 05:25 pm

Headspace internal standard December 13 - 11:12 am

Hexane Isomers Validation December 19 - 06:23 am

GC Method for higher alcohols in spirits December 17 - 05:56 am

Peak leading December 19 - 03:33 pm

TEA detector - looking for contract laboratory December 23 - 05:29 am

Analysis of Miglitol April 29 - 04:39 am

PEAK SIZE PROBLEM IN GC November 11 - 05:14 am

Tcd error 217 July 19 - 02:15 pm

Hewlett Packard sales and service where are you? October 18 - 06:29 pm

Installation of minibore column in Agilent 6890 GC December 4 - 04:31 pm

Inconsistent gases analysis with GC January 10 - 08:44 am

Oil in solvent July 6 - 02:31 am

Ethyl Carbamate in Wine February 6 - 11:57 pm

Peak response changes: headspace-GC-FID June 3 - 09:24 am

Dangers of Hydrogen as carrier? June 13 - 11:32 pm

GC Internal Calibration January 31 - 11:42 am

Gas chromatography January 6 - 02:50 am

Matrix effects for residual solvents? January 3 - 09:47 pm

Best system for H2, CO2 separation January 2 - 10:48 pm

Nitrosamines by GC January 6 - 10:00 am

Cold on column injection January 29 - 06:29 pm

PCBs in mineral oil January 14 - 05:50 am

Organic acids with GC, Some body can help us? June 13 - 01:24 am

Inconsistent gases analysis with GC January 11 - 07:59 am

Calculation of no. of moles January 22 - 01:07 am

Big problem with reproducibility. January 27 - 02:33 am

Bias vs different internal standards January 23 - 12:13 pm

Why do GC areas vary on main components but not on impurities? January 23 - 06:26 pm

Cetylpyridinium chloride January 22 - 12:34 pm

Enantiomers separations chromatogram January 27 - 09:24 am

Natural gas analysis January 27 - 04:03 am

GC Settings (Varian 1400) January 29 - 06:36 am

Oxadiazon and Dithiopyr analysis on GC February 5 - 06:15 am

Isomers in polar columns February 7 - 02:56 am

GC purity test method validation June 8 - 03:41 am

Poropak interaction with Oxygen February 13 - 10:04 am

Sulphur chemiluminescence detector ....... what are the shortcomings? February 12 - 04:53 am

GC method February 14 - 07:33 am

Peak tailing of boronic ester in DB-5MS column February 15 - 10:17 pm

Headspace injection February 26 - 09:09 am

Looking for 150 Litres Elastic Bladder Membrane for gas sample February 22 - 04:34 am

Quantitation limit February 28 - 11:45 am

Hydrogen as a carrier gas February 28 - 11:01 am

Water detection by TCD June 5 - 06:22 am

Metric gas supply tubing April 3 - 10:58 am

GC with FID May 7 - 05:46 am

Fatty acid peak separation problems June 5 - 02:30 pm

Adapter from capillary to packed column March 27 - 11:40 pm

How to do the determination of epichlorohydrine? March 6 - 09:29 am

Inexpensive alternative to Chemstation May 7 - 01:47 am

GC- dual detector system March 27 - 11:55 pm

What is typical flow rate for cap column? March 28 - 12:02 am

Analysis of substituted amides present in primary amines March 5 - 05:55 pm

Effect of Column ID on Sample Detection April 3 - 12:29 pm

Acetylation of morphine March 14 - 02:33 pm

Method for ethanol analysis March 16 - 06:43 am

How can get? " GC Column Performance" by Grob Test Mixes March 24 - 04:05 pm

SPME Method April 9 - 12:34 pm

Gases sequence for Porapak Q column April 1 - 06:27 am

Water Injections - Polar or Non-Polar Column? April 2 - 02:12 am

Quantitation Errors with Peak Trapping May 29 - 02:08 am

Increasing internal standard peak area April 8 - 12:38 pm

Shelf life of capillary columns? April 8 - 11:05 pm

Analysis of sulfonated phenols April 6 - 05:28 am

Please help with GC FID calibration! Urgent! April 11 - 02:45 am

GC system suitability standard April 11 - 11:52 am

FID vs. TCD April 21 - 07:20 pm

Methanesulfonyl Chloride on GC April 16 - 11:20 pm

Analytical procedure of Halquinol BP 80(Chlorinated 8-hydroxyquinoline) for assay determination? April 13 - 07:29 pm

More SPME questions July 6 - 04:06 am

GC of Nonionics in phosphate esters April 22 - 04:25 am

GC x GC vs. Traditional heartcut separations June 10 - 12:21 am

Purity analysis April 24 - 12:22 am

Abraham' s Solvation Parameter Model April 21 - 07:15 pm

Help in Headspace Analysis Requested May 14 - 08:52 am

Loss of respons April 29 - 06:30 am

Looking for book on Fast GC April 25 - 09:45 am

OVI METHOD FIVE April 30 - 08:58 pm

Hydrogen versus Helium GC carrier gas peak shape problems May 9 - 11:41 am

Injection of Water Containing Low Boiling Solutes May 8 - 04:17 am

Determination of NO May 9 - 09:01 am

Any suggestion for advanced GC training? May 12 - 10:10 am

Any information about GC- HP515? May 21 - 07:53 am

Gas samples not at room temperature May 8 - 08:36 am

Bleeding May 23 - 08:47 am

Separation of cis-trans isomers May 9 - 05:46 am

Termprature programming May 12 - 09:28 am

Acetic Acid May 19 - 05:13 am

Heat exchange prior to sample injection May 15 - 04:40 pm

Natural gas-Determination of H2O May 13 - 06:35 am

Limits for Retention Time May 15 - 01:15 pm

One question about Linear Velocity May 29 - 04:35 pm

DMSO Analysis May 13 - 11:11 am

C1-C4 separation without cryogenic May 20 - 09:53 am

Setup for C1 - C32 analysys May 22 - 11:37 pm

Flash GC May 22 - 02:40 am

IS dynamic calibration really necessary if one can calculate.. May 27 - 05:43 am

Is (0,0) not the perfect point in a chromatographic method...!! June 2 - 08:23 am

Ethane Cracking Furnace Effluent on-line Analysis May 27 - 02:05 pm

Water content using GC TCD May 30 - 11:30 am

Calculation of FID response factors for GC June 2 - 12:17 pm

Varian FactorFour Capillary Columns? June 12 - 05:18 am

Dynamic Headspace Systems - Any suggestions ?? June 11 - 08:49 am

Calculation of quantifiaction of any residual solvent by GCHS June 9 - 05:20 am

Preventative Maintenance for GC June 18 - 12:04 pm

Methane sulfonic esters in mesylates June 13 - 12:05 am

1,1,2-trifluroro 2,2,1-trichloroethane query June 20 - 06:36 pm

Conventional to "fast" GC June 19 - 08:44 am

GC of TFA/acetic acid June 25 - 03:53 am

How to optimize a PTV-injection method June 27 - 12:36 am

How to determine the Analysis Accuracy? June 5 - 06:01 am

Deconvolution software for GC-FID data May 30 - 05:32 am

Method for methane sulfonic acid and maleic acid January 12 - 08:00 am

Stationary phases for packed columns December 9 - 10:12 am

Millennium Control Agilent GC February 22 - 11:47 pm

Method for olefin and paraffin analysis July 20 - 06:35 pm

Silylation method for GC July 18 - 05:05 am

Trying to resolve acetaldehyde and methanol July 18 - 05:19 am

Liner replacement & deactivation. July 17 - 05:22 am

System Qualification July 9 - 09:24 am

Please help for GC: ignition problem July 16 - 05:35 am

Coupling detectors in series July 4 - 12:02 am

Silylation of stearic acid in dodecane July 15 - 09:53 pm

GC is applicable to how many compounds? July 9 - 05:31 am

Ghost peaks on almost new 6890N October 14 - 12:42 pm

Anesthetic gas analysis in blood July 14 - 05:25 am

Aanlysis of triglyceride with GC July 17 - 01:16 am

Integration Problems July 15 - 06:59 pm

At-line/on-line GC July 16 - 03:01 am

Estimating Fatty acids from microbiological samples July 17 - 10:05 am

Acetone as solvent for GC - a no no? July 18 - 03:35 pm

Acetone as solvent for GC - a no no? Part 2 July 15 - 07:07 am

Preventing Tailing with Silated Samples (DB-5) July 24 - 08:23 am

Injection of water in capillary GC July 9 - 05:40 am

Injector Liner Conditioning July 18 - 05:20 pm

Ink analysis July 23 - 09:52 am

Quality of Deactivated Fused Silica July 25 - 03:06 am

Autoinjector syringes for manual injection July 18 - 05:59 am

Refurbished ecd September 14 - 12:20 pm

Nitrous oxide; ecd versus npd July 22 - 03:22 am

Acetone will strip the column bare July 19 - 08:40 am

Head space sampler: loop or syringe? July 21 - 08:21 am

What does anode gas do in the ECD? July 24 - 07:13 am

Halogen detection July 21 - 10:39 pm

GC Column Degradation July 22 - 08:42 pm

Response factors for GC in triglycerides March 26 - 07:05 am

Refurbished 5890 (ii) detectors July 29 - 11:45 am

HP6890N connected to PE HS40XL autosampler? July 24 - 12:38 pm

Help for "non-dedicated instrument" operator July 25 - 07:03 am

Solubility of O2 in solvents July 28 - 07:32 am

Nitrous oxide July 30 - 06:39 am

Practical help August 7 - 05:20 am

Agilent part needed June 1 - 06:50 am

Phosphalipid August 1 - 11:02 am

Large peak August 5 - 08:56 am

EtOH/Crotanaldehyde/Hexane.cyclohexane system August 7 - 08:25 am

Help in Headspace Analysis using SPME Requested August 12 - 04:28 am

Precision requirements for GC August 13 - 06:59 am

Solvent August 11 - 06:23 am

Tracor 570 GC manual (description) August 8 - 05:51 am

Rate Theory August 14 - 03:36 am

CTC magnetic crimp caps August 28 - 03:35 am

Detector to detector variation August 18 - 08:56 am

Peak disappear in GC chromatogram. August 24 - 10:13 am

Normalisation of gas Chromatographic data August 21 - 04:58 am

PHTHALATE ESTERS IN ALCOHOLIC BEVERAGES August 24 - 08:23 am

Orion EZ Flash GC Questions August 21 - 04:19 pm

Silicon micromachined gas chromatography system August 23 - 02:15 pm

Make-up with FID August 29 - 10:17 pm

Boronic acid derivatization in aqueous solution August 25 - 03:11 am

Wax Type Column Stability August 26 - 12:32 pm

HELP - How to determine equilibrium time in headspace analysis? September 26 - 05:59 am

Water as solvent September 2 - 06:03 am

Area Counts... how many is enough? August 30 - 11:13 am

Methyl acetoacetate September 2 - 06:06 am

Area to noise threshold September 3 - 12:52 pm

Multiple HeadspaceExtraction September 5 - 05:18 am

Two question about GC September 22 - 06:44 pm

Acetic acid by GC-HS ? September 8 - 03:21 am

Problems when calibrate GC September 13 - 04:23 am

Gaseous halocarbons analysis observation/question September 16 - 09:04 pm

Extraction of UV stabilizer September 24 - 07:48 am

What is the operating signal range of Agilent micro ECD? September 18 - 02:20 am

Problems with septa September 19 - 09:02 am

GC sensitivity October 2 - 11:25 am

Fatty acid analysis by GC September 26 - 12:00 pm

Solvent for HP-624 September 22 - 01:53 pm

Nitrogen gas analysis by GC October 4 - 05:12 pm

Choosing a GC plateform October 20 - 05:32 am

Retention time irregularities October 10 - 10:43 am

5890-6890 HP-Agilent oven rate ramp check October 18 - 12:39 pm

Fatty acids October 14 - 10:44 am

Dichloroacetaldehyde October 15 - 03:47 am

Boc anhydride by gc October 16 - 10:23 pm

Overload of a GC ECD detector October 16 - 06:11 am

Analytical Method of Fosamine Ammonium October 17 - 07:35 am

GC column Temperature October 27 - 09:12 am

Millennium32 v.3.2 controlling a 6890N April 26 - 08:50 am

Application assistance September 14 - 03:09 am

Training schedule design, any ideas?? July 11 - 06:56 am

GC columns upper temperature limits July 16 - 04:05 pm

Brian Middleditch August 22 - 04:50 am

Quick reference guide for columns September 23 - 03:48 am

Makeup flow for FID January 12 - 12:03 pm

Headspace Sampler November 10 - 08:07 am

Analysis of allergens in perfumes May 11 - 12:10 pm

Carry over problems with the PTV inlet March 4 - 05:54 pm

Electron capture detectors December 15 - 04:22 am

Advantage and disadvantage of coated or packed GC November 3 - 05:07 am

Response factors for GC November 3 - 05:23 am

7694 Headspace Sampler For Sale November 5 - 06:29 am

AIA datas format December 15 - 04:32 am

Analytical Controls Report Generator November 6 - 10:10 am

About SPME use November 12 - 02:06 pm

GC method for methanesulfonamide November 7 - 04:55 am

Carrier gas for split injection November 13 - 04:53 am

Chiral columns November 10 - 08:21 pm

Glycerin USP method, help to make it work November 14 - 07:35 am

Attached cdf Files November 18 - 11:02 am

Packed versus capillary columns November 14 - 08:32 am

Parts for Varian 3600 GC/TCD June 1 - 04:11 am

Sebum stdandard November 24 - 12:28 pm

Formaldehyde impurity in methanol April 21 - 03:58 am

EPA Methods January 30 - 05:37 am

Tailing peaks May 21 - 12:37 pm

Formula for peak resolution November 25 - 12:12 pm

TFA Content by GC April 22 - 01:17 am

Noise reduction for Varian 3800 with PFPD November 27 - 06:11 am

Fast GC November 30 - 08:41 pm

Constant Pressure vs. Constant Flow December 4 - 11:57 pm

Research Paper On Chromatography. Please Help! December 9 - 08:29 am

Is it usual? December 9 - 08:01 am

Forensic analysis December 5 - 12:03 am

GC x GC of Essential Oil April 12 - 10:08 am

Dual ECD Signal & A/D box problem December 9 - 02:08 am

Puzzled by GC outcome December 12 - 08:50 am

Autosampler possible for 10mL injections? December 10 - 11:43 pm

Double peak in N2O ref gas December 15 - 03:54 pm

Scheme March 14 - 10:58 pm

Reproducibility April 22 - 09:47 am

HS vs SPME or SpDE December 17 - 08:29 am

Method of standard additions by Headspace January 21 - 09:00 am

FID sensitivity 10X lower from different instrument January 14 - 03:44 am

Noba-a silylating agent - chromatographic purity - urgent December 23 - 12:23 pm

DMSO as matrix December 29 - 06:51 am

Which one is better? December 31 - 06:06 am

GC problem analysis for N,N-Dimethylfomaide Dimethyl acetal January 2 - 06:20 am

Sil-prep shelf life January 7 - 08:12 am

Hydrogen Generators for FIDs January 28 - 05:42 am

Us epa method 551.1 January 10 - 09:25 am

Research Paper Follow-up January 11 - 04:43 pm

ECD detectors - changing response January 13 - 01:28 am

Baseline drift January 16 - 07:03 am

Butanol determination January 22 - 01:36 pm

Determination of acetone(ppb levels) in HCl January 18 - 10:38 pm

Phenylhidrazine (GC) March 31 - 05:23 pm

Chromosorb 102 alternative January 21 - 10:37 am

GC 6890 direct control by Millennium32 March 31 - 06:34 pm

GC 6890 direct control by Millennium32 January 21 - 12:36 pm

Preparating proficiency testing (Natural Gas) sample January 23 - 06:55 pm

Is the Van Deemter equation only a model ? :-( January 29 - 01:59 pm

Fronting Peaks January 30 - 04:13 am

Metylsters seperation February 10 - 06:55 am

KETO ENOL TAUTOMERISM April 1 - 06:08 am

KETO ENOL TAUTOMERISM February 12 - 01:42 am

Chlorophacinone February 13 - 05:46 pm

Tailing value February 18 - 09:53 am

GC qualification February 17 - 05:55 am

PCB GC analysis help May 14 - 12:45 pm

Oxygen / Moisture Filters and Wax Columns February 20 - 09:29 am

Column selection help urgent please!! July 28 - 11:49 pm

Unreacted monomer in latex February 20 - 05:16 am

DMF carry over February 26 - 02:14 am

Unknown impurities found in HSGC method February 23 - 05:48 am

ANALIZE BY GC FOR DIMETHYL ADIPATO February 25 - 10:00 am

Discrimination by compostion solvent February 26 - 11:47 pm

NEED HELP (GC) February 26 - 10:15 am

A quick question February 26 - 05:50 pm

11mm Electronic Vial Decapper February 27 - 02:51 am

Does anyone in here run Endothall by method 548.1? February 28 - 10:41 am

Poor RSD with FID GC March 6 - 05:20 pm

Stability Indicating Method on GC March 5 - 01:07 pm

Ionization suppression in GC as well? March 16 - 05:34 am

Diethanolamine in caustic treating solutions March 7 - 02:29 pm

Tracer gas testing and selection of chromotagraphy equipment March 10 - 09:08 am

Thermal Conductivity Sensor March 8 - 03:20 pm

Analize of pentaerititriol and di-pentaeritritiol March 11 - 07:43 am

Poor riproducibility with a GC-FID April 22 - 08:56 am

Determination of volatile impurities in non-water soluble substances (Method IV - Headspace) March 14 - 11:49 pm

TEA content by HSGC April 2 - 09:23 pm

Determination of the Inner diameter of GC Capillaries March 17 - 08:04 am

Diluient selection for RS/OVI method March 17 - 10:50 pm

Organic Volatile Impurities by HS/GC European Pharmacopeia March 18 - 05:14 am

ECD method development troubles March 25 - 09:22 am

Sample preparation for HPLC March 26 - 03:09 am

Help: The analytic methed of 1,3-propanesultone March 18 - 06:03 pm

Triethylamine by HSGC March 20 - 05:28 am

New Detailed Hydrocarbon Analysis Software March 22 - 10:57 am

Methylene chloride FID March 24 - 06:08 am

Spooler Problems March 23 - 07:11 am

Free fatty acids/no derivatization/methanol peak March 26 - 09:57 am

Effect of Concentration on Plate height March 25 - 06:59 pm

Early spikes in FID chromatogram May 13 - 12:54 am

EtOH in amino acid buffers April 22 - 12:15 pm

A GC QC test for 4,7-Diphenyl-1,10-Phenanhtroline and Hydroquinone March 24 - 11:10 pm

6890 Thermal Shutdown April 6 - 02:44 pm

HMX Analysis by GC/ECD April 2 - 01:46 pm

TCD signal April 1 - 07:43 am

Haloacetic acid analysis April 27 - 01:44 pm

FID Collector Head - Perkin-Elmer April 7 - 05:17 am

Thermal Aux#1: type differences April 7 - 07:40 am

To derivitize or not to derivitize?!? HELP!!!!! April 10 - 05:04 pm

Alkanolamines, GC-problems April 7 - 05:38 pm

Disabling the Agilent 6890 NPD Adjust Offset April 22 - 12:09 pm

What liner is the best in the world? April 8 - 11:19 am

Resolution problem with Exxate 1200? April 16 - 07:37 am

GC FAME calibration April 16 - 08:24 am

Neon carrier gas for H2, CO, CO2, CH4 detection April 12 - 04:04 pm

Lauric acid/washing solutions May 4 - 07:23 am

Carbamate by GC April 21 - 06:40 am

FID won't light May 11 - 06:47 am

Analyze PAHs with GC - FID April 26 - 06:45 am

Proper use of trifluoroacetic acid April 26 - 11:42 pm

Residual solvents April 27 - 09:30 am

HP 3396 integrator May 21 - 06:38 am

Criterion to choose "indicator" compounds- help required April 30 - 10:29 am

GC software April 28 - 02:59 pm

Autosystem XL PPC Hardware Error Shutdown April 29 - 05:05 am

Fusel alcohols in fuel May 1 - 09:23 am

Manual Integration - The do's and don'ts April 30 - 12:49 pm

Quantification of a sum of components May 3 - 04:20 am

Triethylamine content in drug substances May 2 - 07:04 am

GC sample of cyclooctane, pentanoic acid, and ethanol May 1 - 11:25 am

GC-TCD calibration problem May 26 - 08:44 pm

Safety tips for dioxins analysis in Laboratory???? May 3 - 11:35 am

Carrier Flow Measurement May 5 - 04:31 am

HP-5 & HP-1701 capillary columns May 6 - 11:04 pm

Lactic acid May 24 - 11:50 pm

Broad solvent peaks and extraction problems May 31 - 02:55 am

Sample Volume / Stops for Chemstation Software May 5 - 11:17 am

GPC analysis of melamine formaldehyde (MF) resins May 10 - 04:18 am

FID response time May 9 - 03:32 am

Reproducable results from GC May 9 - 03:26 am

Lactic acid 2 May 12 - 02:09 am

Traps May 10 - 05:01 am

ASTM D4815 May 19 - 10:52 am

GC / ECD stabilization May 14 - 12:27 pm

Repeller 5973ms cleaning or changing????? May 13 - 08:45 am

Extraction procedures of hydrocarbons from sediments & Sea water May 12 - 12:26 pm

Organic Solvent Separation Problem May 13 - 08:48 am

Phthalate contamination May 21 - 06:31 am

Detector choice for best quantification? May 21 - 06:51 am

Any Solutions to Carryover?? May 18 - 11:49 pm

Wide bore column May 27 - 07:50 am

Suggested temperature program for Haloacetic Acid analysis (EPA 552.2)? May 15 - 02:40 pm

Solvent drift May 18 - 01:11 pm

Seperation for Secondary & Tertiary Amine using GLC May 18 - 03:36 am

Ar / O2 separation May 18 - 10:06 am

Column cross reference Please May 19 - 07:43 am

Alditol acetate May 24 - 05:16 am

Detectors needed for C2H4, N2O and CO2 May 24 - 09:23 am

Separation of N2,CH4,CO2, water, meOH, H2S, CH3OCH3, CH3SH May 19 - 04:49 pm

Carbohydrate analysis May 20 - 11:27 am

"Inlet pressure" high and auto shut down of GC May 22 - 05:58 pm

Purity of H2 May 25 - 03:56 am

Over head space gases analysis for liquid formulation May 24 - 11:25 am

High boiling impurities May 29 - 02:06 pm

GC analysis problem May 29 - 02:02 pm

Agilent Chemstation - Grouping Function May 28 - 11:53 am

Separation of co-eluting Ar and O peaks? May 31 - 12:38 am

Derivatization sugars May 31 - 08:17 am

Pressure at the head of column August 30 - 05:10 am

Gas phase chromatographie August 30 - 05:12 am

Carrier gas August 30 - 05:12 am

Gas phase chromatographie August 30 - 05:13 am

Crude oil analysis by GC August 29 - 06:49 am

Ph Eur method 2.4.24.IDENTIFICATION AND CONTROL OF RESIDUAL SOLVENT August 27 - 02:12 am

Vfa analysis August 26 - 05:17 pm

14C through the GC August 27 - 12:01 am

Aqueous samples by GC August 27 - 01:52 am

Micro GC agilent 3000 August 28 - 02:01 pm

Hydrogen detection August 25 - 11:45 pm

Calibration gases August 27 - 01:48 am

Kind of carrier gas? August 30 - 05:14 am

Micro GC August 28 - 02:03 pm

Chlortalonil HPLC method? August 30 - 03:09 am

Fruity Problem August 19 - 06:50 am

Allergens in Soap and Shampoo August 30 - 09:25 am

Gas standards August 19 - 09:01 am

Derivatization of Sulfonic Acid Moiety August 17 - 06:21 am

Chlorthalonil residue in food samples August 18 - 06:41 pm

Good %RSD, bad retrieval rate??? August 26 - 02:40 am

GC job market? August 16 - 08:05 am

Using calibration curve fits to quantitate August 16 - 11:28 am

GC method for methly methane sulphonate August 17 - 02:17 am

Adsorption, Negative Intercepts and Calibration Curves August 15 - 03:18 pm

Helium carrier gas August 23 - 12:50 pm

Head Space problem August 24 - 08:26 am

Limit of detection via chromatogram August 15 - 02:40 pm

Limit of detection via chromatogram August 11 - 09:48 pm

Hydrogen and carbon monoxide peaks in Porapak Q August 24 - 12:36 pm

Solvent analysis August 12 - 08:02 am

MTBE August 16 - 07:19 am

Chromic acid August 17 - 07:35 am

Hydrogen detection August 10 - 05:58 am

Detection of residual solvents in edible oil samples August 10 - 05:55 am

ECD BACKGROUND SIGNAL II August 10 - 12:11 pm

Hydrogen detection August 16 - 07:23 am

Dynamic headspace August 11 - 12:24 am

Hydrogen as carrier gas instead of Helium using gas generator August 5 - 08:08 am

NH3 and HCN gas analysis by PFPD August 4 - 09:05 am

ECD ULTRA HIGH BACKGROUND SIGNAL August 5 - 08:06 am

Opinions on TotalCrom August 9 - 09:42 am

N2 and Ne August 4 - 03:59 am

Ethyl acetate and diethyl ether August 4 - 09:09 am

HP 5890/ 3396 Series II Integrator Problem August 12 - 04:39 am

Packed columns obsolete? August 16 - 06:36 am

Acid chlorides...GC or LC? August 2 - 12:31 pm

Turbochrom software August 9 - 09:27 am

Packed column for Propylene oxide August 2 - 01:04 pm

Baseline Drift and Carrier Purity August 4 - 02:42 pm

Excessive run number on Micro-GC/TCD July 28 - 01:12 pm

GC signal problem August 6 - 12:53 am

Split July 28 - 10:22 am

Area Count Reproducibility July 29 - 07:27 am

Test Message July 27 - 09:23 am

Sucrose removal from sample? July 27 - 09:29 am

Right SSL Method, Right Carrier method, Surge Pressure July 27 - 07:18 am

Trazodone USP method, Impurity problem July 25 - 10:22 am

Response of 2-Ethoxy ethanol by GC/FID August 16 - 04:44 am

To Consumer products Guy July 24 - 04:26 am

Metylamine July 23 - 08:39 am

Deternination of limit of detection (LOD) via calibration curve July 27 - 05:08 am

Application of Internal standard in GC analysis July 20 - 08:53 am

Standard curve August 20 - 03:21 am

GC theory and literature July 24 - 05:17 pm

Calibrating a GC autoinjector June 11 - 03:20 am

Fatty acid analysis by GC June 16 - 03:45 am

Surrogate for PAH analysis August 23 - 01:02 pm

NPD to FID ? July 1 - 12:08 pm

Acid and Acid chloride separation by GC August 3 - 06:39 pm

Derivatization free acids July 21 - 11:19 am

FAME Esterification June 8 - 01:17 pm

Wax Column Bleed Problem February 20 - 07:28 am

Going from a packed column to an equivalent capillary column! July 9 - 04:49 am

Gc message board July 9 - 05:05 am

Old Perkin Elmer Instruments June 16 - 01:05 pm

Diluent selection for RS/OVI method June 1 - 09:41 pm

Repeated PTV (Gerstel CIS4) Carry over / loss of sensitivity for higher analytes August 16 - 08:06 am

ACID CONTAMINATION OF THE ECD DETECTOR June 23 - 07:58 am

Method validation June 22 - 07:27 am

Liner restoration July 14 - 01:36 pm

What causes the tailing of chromatogram using FID June 9 - 09:24 pm

How to start with HSGC? June 9 - 10:04 pm

Calibration curve July 1 - 11:30 am

FID sensitivity loss July 21 - 01:28 pm

What is chromatography? June 9 - 10:57 am

He and Ne separation June 11 - 03:20 am

Electron Capture Detector July 11 - 12:57 am

MTI Password June 15 - 06:57 am

Derivatization of Mycolic acids by BSTFA June 4 - 08:01 am

Determination of trace amount HCl in a gas form mixture June 3 - 02:19 am

Acetoxylation products separation June 1 - 03:22 am

HMDS-TMCS derivatization June 1 - 05:23 am

Software questions.... June 11 - 03:33 am

Ethylene Oxide Residuals August 6 - 01:55 pm

OVI Test June 11 - 03:37 am

Urine organic acids - SPE method June 8 - 06:53 am

Drift in peak detection? June 16 - 02:18 pm

PAHs in montan wax June 8 - 07:03 am

Vicinal diketone in beer by GC June 8 - 07:05 am

NGA vs. LPG June 14 - 12:13 am

Peak Tailing on GC FID please help me !!! June 10 - 08:11 am

Restek VS Agilent Column Quality June 23 - 08:46 am

Acetaldehyde in beer June 19 - 04:51 pm

Acrylic acid with GC? June 10 - 03:22 pm

Method for ethanol analysis July 1 - 01:37 pm

Preparation of standards for ethanol analysis June 22 - 01:38 pm

GC sensitivity loss June 15 - 06:43 pm

New board, with search options June 16 - 11:15 pm

Retention time drift July 19 - 09:32 am

Triethanolamine June 14 - 09:11 am

Chrompack Hydrogen Safety System June 15 - 03:12 am

Method for ethanol-water azeotrope July 8 - 08:19 am

Linear dynamic range of FID July 4 - 11:57 pm

Loss of respond in Methamidophos analysis with PFPD June 21 - 02:09 pm

Detecting high concentrations of hydrogen June 22 - 07:34 am

EPA Method 548.1 (Endothall) June 23 - 04:00 pm

Change in slope but retention time is the same June 21 - 06:39 am

Gentamicin related unknown peak , C2b maybe June 18 - 06:25 am

H2S determination by SHIMADZU CR501 June 18 - 08:10 pm

H2S determination by SHIMADZU CR501 June 18 - 08:04 pm

6 Acetylmorphine June 19 - 09:42 pm

Solvent yellow 124 June 21 - 01:33 am

Composition of fatty acids June 21 - 04:03 am

Stock solution and dilution June 22 - 08:07 am

Water injection onto HP5 column? June 29 - 08:28 am

Analysis of avobenzone (bmbm, 4-tert-Butyl-4'-methoxy-dibenzoylmethane ; uv filter) June 25 - 08:59 am

DMF analysis by GC, in which medium can be analysed June 29 - 08:33 am

Vibration affect? June 24 - 06:11 am

Analysis of OP pesticides June 23 - 06:42 pm

Used ionization gauge controller for GC-MS HP5988 June 28 - 03:42 am

Standard Injection Procedure June 28 - 03:24 pm

Calculation on signal to noise ratio,cryogenic work attachment June 26 - 10:41 am

Lactic acid...again June 30 - 09:17 am

Column conditioning June 29 - 06:26 pm

Degradation of Terbacil? June 29 - 01:14 pm

Molecular sieves column regeneration July 7 - 01:01 am

Peak area reproducibility is poor? July 12 - 10:57 am

Suitability of GC column for Fatty ACid Methyl Ester July 9 - 09:14 pm

Ghostpeaks with cold injection system July 20 - 10:00 am

Loss of triglyceride sensitivity July 15 - 11:28 am

FID flame going out July 14 - 05:11 am

Analysis of benzoic ahydride and benzoic acid July 9 - 11:51 pm

MTBE in Naptha Samples July 12 - 06:36 am

Agilent and varian GC July 14 - 05:04 am

Column degradation July 13 - 08:50 am

Tocotrienols & oryzanol standards July 13 - 05:39 am

Dimethyl anthranilate July 13 - 09:02 am

Negative peak with FID July 15 - 10:47 pm

Best ethanol-method with GC-FID? July 17 - 11:34 am

Detection of water July 23 - 12:41 am

AMDIS July 31 - 09:39 am

Acetyl chloride July 15 - 12:38 am

Column July 16 - 11:18 am

Separation og m-xylene and p-xylene by GC? July 21 - 12:49 am

MERLIN Septum July 29 - 01:02 pm

ChemStation timed events July 20 - 08:41 am

Noise Spikes on GC/MS August 29 - 08:19 am

Vacuum time on GC/MS?? August 25 - 11:40 am

How to read Autotune result? August 20 - 02:46 pm

GCMS search library conversion August 30 - 10:31 am

LCMS impurity; please help me !!!!!! August 18 - 09:47 am

0.53mm ID column and GC/MS, possible? August 5 - 11:51 am

Software by Agilent - MSD Chemstation August 5 - 06:33 am

Problems with GC/MS Diclofenac method July 28 - 04:28 am

DDT by GCMSD is not linear? June 10 - 08:12 am

A question about NIST MS liberary? June 4 - 06:37 am

Exciting Job Opportunity December 12 - 08:55 am

GC-MS-which instrument? June 29 - 12:14 pm

GCMS Vs GCMS - RT Variation August 5 - 11:53 am

LC/MS PQ June 9 - 05:00 pm

Agilent gcd series ii gc/ms June 28 - 06:40 am

Ms NoVent Problem!!!! July 15 - 07:37 am

How to find hp GC/MS manual July 29 - 04:43 pm

Mass Spectrum Library for silanizated compounds??? July 30 - 02:38 pm

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