Authenticity assessment of 2- and 3-methylbutanol using enantioselective and/or 13C/12C isotope ratio analysis |
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Authors: | K. Schumacher U. Hener C. Patz H. Dietrich A. Mosandl |
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Affiliation: | Institut für Lebensmittelchemie, Johann Wolfgang Goethe-Universit?t, Marie-Curie-Strasse 9, D-60439 Frankfurt am Main, Germany, DE Forschungsanstalt Geisenheim, Fachgebiet für Weinanalytik und Getr?nkeforschung, Postfach 1154, D-65358 Geisenheim, Germany, DE
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Abstract: | Enantioselective gas chromatography and/or 13C/12C isotope ratio analysis are suitable tools for the authenticity assessment of the fusel alcohols, 2- and 3-methylbutanol (1 and 2, respectively). The chiral compound, 1 is biosynthesised almost completely as the (S)-enantiomer, regardless of which carbohydrate source is used for fermentation. The type of CO2 fixation and some plant-specific influences were of prime importance to the 13C/12C isotope ratios of the starting materials in alcoholic fermentation, and the δ13C values of 1 and 2 differed significantly. In general, the δ13C values of 2 were about 4–5ö lower than those of 1 produced via the same fermentation process. 13C/12C isotope ratio analysis results can be used to determine between fusel alcohols produced from different sources, and provides a new and valuable method of authenticity assessment. |
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Keywords: | 2-Methylbutanol 3-Methylbutanol Carbon-13/carbon-12 isotope ratio analysis Gas chromatography-isotopic ratio mass spectrometry Authenticity assessment |
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