Tequila authenticity assessment by headspace SPME-HRGC-IRMS analysis of 13C/12C and 18O/16O ratios of ethanol

被引：62
|
作者：
Aguilar-Cisneros, BO
López, MG
Richling, E
Heckel, F
Schreier, P
机构：
[1] Univ Wurzburg, Lehrstuhl Lebensmittelchem, D-97074 Wurzburg, Germany
[2] Ctr Invest & Estudios, Unidad Biotecnol & Ingn Genet Plantas, Irapuato 36500, Mexico
来源：
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY | 2002年 / 50卷 / 26期
关键词：
Agave (Agave tequilana Weber var. Azul); tequila; authenticity; spirits; ethanol; isotope ratio analysis; carbon isotope; oxygen isotope; HRGC-C/P-IRMS;
D O I：
10.1021/jf0207777
中图分类号：
S [农业科学];
学科分类号：
09 ;
摘要：
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.
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页码：7520 / 7523
页数：4
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