Tequila volatile characterization and ethyl ester determination by solid phase microextraction gas chromatography/mass spectrometry analysis

Journal of Agricultural and Food Chemistry
B Vallejo-CordobaMaría del Carmen Estrada-Montoya

Abstract

Solid phase microextraction (SPME) and gas chromatography were used for tequila volatile characterization and ethyl ester quantitation. Several factors determined the differences in tequila volatile profiles obtained by the SPME technique, namely, sampling mode, fiber coating, and fiber exposure time. Each of these factors determined the most suitable conditions for the analysis of volatile profiles in tequila. Volatile extraction consisted of placing 40 mL of tequila in a sealed vial kept at 40 degrees C. A poly(dimethylsiloxane) fiber was immersed in the liquid for 60 min and desorbed for 5 min into the gas chromatograph. The identified volatiles by mass spectrometry were mainly alcohols, esters, and ketones. The calibration curves for ethyl hexanoate, octanoate, and decanoate followed linear relationships with highly significant (p < 0.001) determination coefficients (R2 = 0.99). The coefficients of variation of less than 10% for ethyl ester concentrations indicated that the technique was reproducible. The limits of quantitation for ethyl esters were 0.05 parts per million, which were below the concentration range (0.27-15.03 ppm) found for different tequila samples. Quantitative differences in ethyl esters were found for th...Continue Reading

References

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Citations

Apr 17, 2008·Bioprocess and Biosystems Engineering·P Escalante-MinakataR González-García
Apr 13, 2012·Journal of the Science of Food and Agriculture·Angelika Ziółkowska, Henryk H Jeleń
Sep 26, 2006·Journal of Chromatography. a·Araceli Peña-AlvarezCarmen Labastida
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Mar 8, 2005·Journal of Mass Spectrometry : JMS
Jun 3, 2005·Phytochemical Analysis : PCA
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Feb 17, 2009·Journal of Agricultural and Food Chemistry·Juan Fco Martínez-Aguilar, Araceli Peña-Alvarez
Sep 27, 2017··Svetlana A. ShatunovaAdadi Parise

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