By Michele Williams on Thursday, January 15, 2004 - 11:43 am:
I need to analyze aqueous HCl (32%) and anhydrous HCl for low levels of acetone. I have several GC's and can order any type of column I need. I have TCD, FID, MS and ECD detectors. I do not have access to a purge and trap GC nor do I have an LC. Does anyone have a suggestion?
By Anonymous on Friday, January 16, 2004 - 07:02 am:
If you don't have purge and trap then it is possibly an application for solid-phase microextraction onto a silicone-coated fibre. Rinse the fibre in water and "inject" into a conventional GC inlet.
Might be better than purge and trap - where are those corrosive acid gases going ?
By Consumer Products Guy on Friday, January 16, 2004 - 08:44 am:
Michele - I "gots" to know: why is there need for this, how might acetone get into the HCl?
By Rodney on Friday, January 16, 2004 - 09:06 am:
Use a simple headspace analyzer method and a FFAP capillary column. I would suggest a Nickel transfer line or a deactivated SS transfer line.
Heat for 10 min. at 60C. OR
Use a Carboxen coated SPME fiber if you want to go cheap and quick. This will work fine, but for strict reproducibility requirements ( ie FDA or EPA - US Gov requirements) use an automated HS analyzer.
Rodney George
Senior Research and Development Scientist
Gas Separations Research
Supelco
595 North Harrison Road
Bellefonte, PA 16823
814-359-5737 voice
814-359-5459 fax
rgeorge@sial.com
By Anonymous on Sunday, January 18, 2004 - 10:38 pm:
Maybe you can add dil NaOH to neutralize HCl, get NaCl and then determine acetone by Headspace.