By R.Ryser on Tuesday, October 24, 2000 - 08:45 am:
I'm looking for sensitiv HPLC method to determinate glyphosat and AMPA in water.
Pickering offer a kit for glyphosat and AMPA.
Have someone used this kit already?
What's the detection limit of this system?
Are there other cheaper possibilitis to determinate this substances?
Thank's for help
By Anonymous on Tuesday, October 24, 2000 - 10:53 am:
Hamilton has PRP-X400 column for glyphosate analysis. Please visit http://www.hamiltoncompany.com.
By B.Buglio on Tuesday, November 7, 2000 - 09:56 am:
You might want to look at EPA Method 547 for
glyphosate in drinking water. It involves, after
liquid chromatography, post column derivatization
and fluorescence detection (very sensitive).
By Anonymous on Monday, December 18, 2000 - 06:53 am:
Someone needed to define compliance level and "very sensitive" in this thread. Glyphosate is one of the cases where the the US EPA drinking water limit of 700 ug/L (if my facts are correct)is greater than the European limit by a huge margin, 7000x greater to be exact. The UK for example is reviewing methods of achieving compliance to 0.1ug/L, but EPA 547 is not one of them unless the sensitivity has been improved at least 200X since it was written. Favourite at the moment is a concentration step followed by derivatization with trifluoroacetic anhydride and heptafluorobutanol, GC-CI-MS, to give detection limit of 0.002 ug/L (CI).
By R.Ryser on Friday, January 5, 2001 - 01:30 am:
To Anonymous
Can you give me more Information about this GC-CI-MS Methode?
By Anonymous on Friday, January 12, 2001 - 02:42 am:
The method was published in poster form at the 3rd European Pesticide Residue Workshop York, UK, July 2000, chaired by Central Science Laboratory, York UK. The book of abstracts does not have an ISBN so you would probably need to go direct to the workshop chairman s.reynolds@csl.gov.uk for a copy.
Poster Abstract number 95 by
Paul Johnson, Duncan Rimmer, Marie-Eve Martin
Analysis of glyphosate in environmental and occupational hygiene samples.
Health and Safety Laboratory Sheffield UK
8ml of water is passed through a cation exchange SPE cartridge, blown to dryness, taken up in 50uL eluant from SPE. The residue is acetylated and esterified with TFAA and HFBA in one step in a Reacti-Vial before GC-NCI-MS. Not all the issues have been resolved. Water hardness may be a factor in recovery at very low levels.
Contact paul.johnson@hsl.gov.uk if you need more details.
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