オーラルセッション
- 第2日 5月12日（火） 9:05～9:25 C会場（1101/02）
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2C-O7-0905（2P-39） PDF
LC/IRMSを用いた日本酒の純米酒，吟醸酒，普通酒の識別方法の開発
In 2004, liquid chromatography combined with isotope ratio mass spectrometry (LC/IRMS) has been developed, which allows the measurement of stable carbon isotope (δ13C) composition of highly polar and non-volatile analyses. Recently, LC/IRMS has been used to authenticate and trace products such as honey, wine, and lemon juice, and compounds such as caffeine and pesticides. However, analysis of complex multicomponent samples is difficult due to limitations of flow rate and mobile phase as a problem of LC/IRMS.
Sake is a traditional Japanese alcohol. Nowadays, the consumption for Sake is increasing in worldwide and its popularity is growing. However, there are act of fraudulence by additional brewers’ alcohol and sugar.In this study, we analyzed the δ13C values of the ethanol (δ13Ceth) and glucose (δ13Cglu) in Sake by liquid chromatography combined with isotope ratio mass spectrometry for the first time.Further, we developed the criteria using δ13Ceth and δ13Cglu to check brewers’ alcohol and sugar. In addition, there are some sake categories (Ginjyo and Futsu-shu) allowed to additional brewers’ alcohol up to legally determined percentage.