[Gas chromatographic analysis of alcohols, aldehydes and esters in potable spirits]

The determination of alcohols, aldehydes and esters in potable spirits was accomplished with a new kind of chromatographic packing made in China--graphitized carbon black (SHT2), modified with PEG-20M. By means of programmed temperature and direct injection, quantitative measurements of 22 components in potable spirits can be simultaneously finished in 50 min. The detect limit of the method was 1 ppm. The coefficients of variation were less than 10%. The recovery tests of 11 components were carried out and the recoveries were in the range of 81.0-106.8%. The method can be applied not only to hygienic monitoring of methanol, fusel oil and furfural, but also to quantitative monitoring of aromatic components in potable spirits. The measurements of several Sichuan spirits samples were made with satisfactory results.