ヘッドスペースガスのガスクロマトグラフィーによる発泡酒および炭酸飲料中のエタノールの簡易微量定量法 : ガスクロマトグラフィーによる揮発性発酵生産物の研究(第4報)

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A simple micro-determination of ethanol in beers, champagnes and carbonated drinks is attempted by gas chromatography using the head-space technique.Ethanol contents were about 4.6 volume% in 4 kinds of beers, and these values remained unchangeable between non-treated and degassed beers. Ethanol contents in champagnes were over values indicated on the bottles. Contents calculated by the head-space technique were close to the values determined by dichromate oxidation. Ethanol was determined in small quantities in 11 of 13 samples of carbonated drinks.When micro-quantitative determination of ethanol in drinks is attemped, the necessary experimental conditions are as follows. Compounds which inhibit the calculation of A'_E (peak area based on ethanol in the experimental solution) and A'_<std> (peak area based on internal standard, n-propanol, in this solution) should not be present in the experimental solution. The concentration of n-propanol and dilution ratio of sample which allows calculation of an appropriate A'_E/A'_<std> should be determined.
1976-11-25