Assignment of raw material and authentication of spirits by gas chromatography, hydrogen- and carbon-isotope ratio measurements .1. Analytical methods and results of a study of commercial products
Assignment of raw material and authentication of spirits by gas chromatography, hydrogen- and carbon-isotope ratio measurements .1. Analytical methods and results of a study of commercial products
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DOI：
10.1007/s002170050111
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发表时间：
1997-01-01
期刊：
影响因子：
--
通讯作者：
Adam, L
中科院分区：
文献类型：
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作者：
BauerChristoph, C;Wachter, H;Adam, L
气相色谱和天然同位素比率的测定是强有力的分析方法，可以用来检查酒精饮料的真伪，并检测任何掺假。为了检验市售水果酒、威士忌等的来源和真实性，对197个样品进行了气相色谱、2(H)-核磁共振和C-13同位素质谱分析。利用不同浓度的甲醇、正丁醇、2-和3-甲基丁醇、苯甲醛、正己醇等挥发性化合物，以及乙醇的(D/H)(I)、(D/H)(II)和C-13/C-12等同位素数据，对不同品种进行了二元和多元判别分析。结果表明，通过多元判别分析，不仅可以区分不同种类的白酒，如核果、苹果、谷物和玉米酿造的白酒，而且可以区分单个品种，如樱桃、李子、Mirabelle和苹果，如果需要检测高度精馏的农业原产酒精并鉴定其原料，那么天然同位素比率是唯一可用的判别分析参数。
Gas chromatography and the determination of natural isotope ratios are powerful analytical methods which can be used to check the authenticity of alcoholic beverages and to detect any adulteration. To check the origin and the authenticity of commercial fruit spirits, whiskies, etc., 197 samples were analysed by gas chromatography, 2(H)-NMR and C-13 isotope mass spectrometry. The discrimination between different varieties was demonstrated by bivariate and multivariate discriminant analysis using different concentrations of volatile compounds such as methanol, butan-1-ol, 2- and 3-methyl-butanol, benzaldehyde and hexanol as well as isotopic data like (D/H)(I), (D/H)(II) and C-13/C-12 isotopomers of ethanol. The results show that by using multivariate discriminant analysis it is possible to distinguish not only between different groups of spirits, e.g. those made of stone-fruit, malaceous fruit, grain and corn, but also between individual varieties, such as cherry, plum, mirabelle and apple, If the detection of highly rectified ethyl alcohol of agricultural origin and the identification of its raw materials are required, then natural isotope ratios are the only discriminant analytical parameters available.