Tequila authenticity assessment by headspace SPME-HRGC-IRMS analysis of 13C/12C and 18O/16O ratios of ethanol
Tequila authenticity assessment by headspace SPME-HRGC-IRMS analysis of 13C/12C and 18O/16O ratios of ethanol
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DOI：
10.1021/jf0207777
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发表时间：
2002-12-18
影响因子：
6.1
通讯作者：
Schreier, P
中科院分区：
文献类型：
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作者：
Aguilar-Cisneros, BO;López, MG;Schreier, P
采用顶空SPIVIE进样和PLOT色谱柱，在燃烧(C)和热解(P)模式(HRGC-C/P-IRMS)中采用在线毛细管气相色谱-同位素比质谱仪(HRGC-C/P-IRMS)测定了正品(n=14)和市售龙舌兰酒(n=15)以及一些其他烈酒(n=23)中乙醇的(13)C(VPDB)和(18)O(VSMOW)值。然而，对于100%龙舌兰和混合龙舌兰，Delta13)C(VPDB)值分别在-12.1到-132ppm和-12.5到-14.8ppm之间发现了相似的变化，而Delta(18)O(VSMOW)数据在这些类别中略有不同：正品100%龙舌兰和混合龙舌兰的Delta(18)O(VSMOW)数据分别在+22.1到+22.8 ppm和+20.8至+21.7 ppm之间。商业龙舌兰酒的数据不太均匀；Delta(13)C(VPDB)数据从-10.6到-13.9 ppm，Delta(18)O(VSMOW)值从+15.5到+22.7%。都是在这两类龙舌兰酒中确定的。由于数据重叠，试图区分这两个类别中的白龙舌兰、休息龙舌兰和陈年龙舌兰都失败了。此外，利用乙醇的Delta(13)C(VPDB)和Delta(18)O(VSMOW)数据将龙舌兰样品与其他烈酒区分开来，仅限于来自C-3和C-4/CAM原料的产品。
By use of headspace SPIVIE sampling and a PLOT column, on-line capillary gas chromatography-isotope ratio mass spectrometry was employed in the combustion (C) and the pyrolysis (P) modes (HRGC-C/P-IRMS) to determine the delta(13)C(VPDB) and delta(18)O(VSMOW) values of ethanol in authentic (n = 14) and commercial tequila samples (n = 15) as well as a number of other spirits (n = 23). Whereas with delta(13)C(VPDB) values ranging from -12.1 to -13.2parts per thousand and from -12.5 to -14.8parts per thousand similar variations were found for 100% agave and mixed tequilas, respectively, the delta(18)O(VSMOW) data differed slightly within these categories: ranges from +22.1 to +22.8parts per thousand and +20.8 to +21.7parts per thousand were determined for both the authentic 100% agave and mixed products, respectively. The data recorded for commercial tequilas were less homogeneous; delta(13)C(VPDB) data from -10.6 to -13.9parts per thousand and delta(18)O(VSMOW) values from +15.5 to +22.7%. were determined in tequilas of both categories. Owing to overlapping data, attempts to differentiate between white, rested, and aged tequilas within each of the two categories failed. In addition, discrimination of tequila samples from other spirits by means of delta(13)C(VPDB) and delta(18)O(VSMOW) data of ethanol was restricted to the products originating from C-3 as well as C-4/CAM raw materials.