摘要
气相色谱-燃烧-稳定同位素比值质谱技术(GC-C-IRMS)在单体化合物的稳定同位素组成分析中具有重要应用,探讨了应用该技术测定葡萄酒中甘油碳同位素比值的可行性并优化了分析条件。研究结果表明,该方法的分析精度可优于0.3‰,然而样品的理化特性,如乙醇含量和甘油含量均会影响结果的准确性。应用"相同处理"原则配制标准品可用于样品数据校正,但是由于不同葡萄酒中乙醇和甘油含量差异较大,使得标准品的配制过程很复杂。因此,我们认为GC-C-IRMS不适于葡萄酒中甘油碳同位素分析。
GC-C-IRMS plays an important role in compound-specific-isotope analysis.In this paper,the feasibility of using GC-CIRMS to determine carbon isotope ratio of glycerol in wine was discussed.The results showed that the analysis precision for individual sample was superior to0.3‰.However,the precision might be influenced by the physiochemical properties of wine samples such as glycerol content and ethanol/water ratio.The principle of identical treatment should be adhered in both standard sample preparation and sample data correction.The great change of the content of ethanol and glycerol in different grape wine samples made preparation of standard wine samples complex.Accordingly,GC-C-IRMS was not believed to be suitable for the analysis of carbon isotope ratio of glycerol in wine.
作者
王道兵
钟其顶
李国辉
岳红卫
WANG Daobing;ZHONG Qiding;LI Guohui;YUE Hongwei(China National Research Institute of Food and Fermentation Industries, Beijing 100015;National Standardization Center of Food & Fermentation, Beijing 100015, China)
出处
《酿酒科技》
2018年第3期17-23,共7页
Liquor-Making Science & Technology
基金
国家自然科学基金(31601553
31601580)
北京市科技新星计划(xx2016B079)
科技部"十三五"重大科技计划(2016YFE0113200
2016YFF0203903)
科技部国际合作项目(2015DFA31720)
欧盟地平线2020(635690-OLEUM-2020-SFS-2014-2015)
作者简介
王道兵(1987-),男,山东人,博士,研究方向为稳定同位素食品分析技术。;通讯作者:钟其顶(1980-),男,高级工程师,研究方向为稳定同位素食品分析技术,E-mail:zhongqiding@163.com。
