Formic Acid Trap for GC Analysis of Fatty Acids and Their Salts

Duthie, A.H.; Wulff, S.; Clark, RO

doi:10.1093/chromsci/21.4.185

Cited by 7 publications

(1 citation statement)

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“…Other configurations of formic acid vapor entrainment devices have been reported (Woo and Lindsay, 1980;Duthie et al, 1983). The construction shown in this work had a considerable safety factor in that the only glass part was extremely heavy walled and therefore very resistant to physical damage.…”

Section: Resultsmentioning

confidence: 58%

Packed and capillary column gas chromatographic analysis of fecal samples for volatile fatty acids

Gray¹,

Olson²

1985

J. Agric. Food Chem.

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Procedures for analyzing volatile fatty acids content of aqueous samples using packed and capillary chromatography columns are described and compared. A packed column system tolerant of aqueous samples was used that incorporated a formic acid vapor entrainment device. This permitted a simple sample preparation and concentration scheme. This system was compared to capillary column analysis with split, manual, or autosampler injection. The autosampler/capillary system used a solvent trapping technique not previously applied to aqueous sample chromatography. The capillary column gave greatly increased resolution, resulting in more precise quantitation and lower detection limits but with slightly longer analysis time. These procedures have been successfully applied to the analysis of volatile fatty acids in large numbers of fecal samples.Volatile fatty acids (VFAs), acetic through valeric, are common

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Section: Resultsmentioning

confidence: 58%