以自動化15N 13C分析質譜儀（ANCA-MS）測定米酒樣品中穩定性碳同位素之比值   全文下載

Using 13C/12C Isotopic Ratio Analysis to Differentiate between Rice Spirits Made from Rice and Cane Molasses

本研究是利用自動化15N 13C分析質譜儀（ANCA-MS）來測定米、米酒、甘蔗糖蜜與甘蔗糖蜜酒精樣品中穩定性碳同位素之比值。藉由混合不同比例之米酒與甘蔗糖蜜酒精來評估測定能力，另外以系列稀釋的酒精樣品用來評估實驗操作的一致性。數據結果顯示，使用ANCA-MS所測定之13C／12C比值可以被用來區分米酒樣品是從米或甘蔗糖蜜製造而來。米酒樣品所測得之數據若是作為監控或判定其酒精是從米或甘蔗糖蜜製造而來之依據者，建議在以ANCA-MS測定13C／12C比值之前，樣品應該加以蒸餾或者稀釋至特定乙醇含量。

In this paper, we used automated 15N 13C analysis MS (ANCA-MS) and stable carbon isotope ratio analysis to analyze samples of rice- and cane molasses-based spirits and their constituent principal ingredients. This methodology was developed to distinguish, in a scientifically accurate manner, rice spirits made of rice from that made of cane molasses. Spirits with different mixed ratios of rice and cane molasses were also prepared for a detection capability test. Series dilution for spirit samples was performed to assess operational consistency. Test results demonstrated that 13C/12C values, as measured by ANCA-MS, can be used as reliable benchmark to distinguish between the two types of rice spirits. It is recommended that test samples should be distillated or diluted to an equivalent level of ethanol prior to measuring 13C/12C values. Data established in this paper can provide criteria necessary to monitor rice spirits sold in the marketplace.