Improvement of Extractive Alkylation Gas Chromatography of Short-chain Carboxylic Acids in Aqueous Solution

In the analysis of short-chain carboxylic acids such as formic acid and acetic in aqueous solution using extractive alkylation gas chromatography, tetrahexylammonium bromide (THAB) a phase-transfer catalyst (PTC) causes high intensity broad peaks chromatogram, interfere with detection derivatives. By an easy treatment perchloric n-hexane, it is possible to remove more than 95% THAB, provide good chromatogram little admixture The desensitization was 16% at maximum, contamination glass insert chromatograph liquid phase column by THAB minimized, trouble continuous measurement could be avoided.