ピロ炭酸ジエチルエステルの酒類醸造への利用 : (第3報) 酒類中の炭酸ジエチルエステルの定量

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This paper describes a new method of directly determining the quantity of diethyl carbonate (DEC), which is decomposition product of diethyl pyrocarbonate added to alcoholic beverages, by using gas chromatography.1. Four kinds of gas chromatographic liquid phases, namely 15% tri-2,4,-xylenyl phosphate(2,4-TXP), 15% trimethylolpropane tripelargonate (celanese ester No. 9), 10% diisodecyl phthalate and 15% polythylene glycol-400 as a complex column (DIDP-PEG), and 25% dioctyl phthalate plus 5% polyethylene glycol-400 (DOP+P) were studied to see their utility in the separation of DEC from various volatile components in alcoholic beverages, such as sec-butanol, isobutanol, n-butanol, isoamyl alcohol, n-propyl acetate, isobutyl acetate, ethyl n-butyrate and isoamyl acetate. DOP+P was found to be the most proper liquid phase.2. The outline of this new gas chromatographic determination of DEC is as follows : To 100ml of an alcoholic beverage sample containing 0.4〜2mg of DEC, one ml of 400 ppm toluene in ethanol was added as an internal substance. Then a 99.8% ethanol was added to the sample to make the ethanol level about 30% (for example, the ethanol contents were 16ml, 18ml and 26ml in sake, wine and beer respectively), because the peak area of toluene on chromatography was unstable at 20% or less of ethanol. 15μl each of the prepared samples was then directly subjected to gas chromatography with the DOP+P column (2m×3mmφ)at 70℃ (HFID detector). The recoveries of DEC in alcoholic beverages were 99〜103%.
公益社団法人日本生物工学会の論文
1970-10-25

ピロ炭酸ジエチルエステルの酒類醸造への利用 : (第3報) 酒類中の炭酸ジエチルエステルの定量

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