Characterization of the Key Aroma Compounds in an American Bourbon Whisky by Quantitative Measurements, Aroma Recombination, and Omission Studies
| Autor: | Peter Schieberle, Luigi Poisson |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Chromatography
Gas Indicator Dilution Techniques Isotope dilution Stable isotope dilution Matrix (chemical analysis) Lactones chemistry.chemical_compound Humans Aroma chemistry.chemical_classification Carbon Isotopes Ethanol Chromatography biology Alcoholic Beverages Ethyl hexanoate General Chemistry Deuterium biology.organism_classification chemistry Odor Benzaldehydes Odorants General Agricultural and Biological Sciences Lactone |
| Zdroj: | Journal of Agricultural and Food Chemistry. 56:5820-5826 |
| ISSN: | 1520-5118 0021-8561 |
| Popis: | Thirty-one of the 45 odor-active compounds previously identified by us in an American Bourbon whisky were quantified by stable isotope dilution assays. Also for this purpose, new synthetic pathways were developed for the synthesis of the deuterium-labeled whisky lactone as well as for gamma-nona- and gamma-decalactone. To obtain the odor activity values (OAVs), the concentrations measured were divided by the odor thresholds of the odorants determined in water/ethanol (6:4 by vol.). Twenty-six aroma compounds showed OAVs >1, among which ethanol, ethyl (S)-2-methylbutanoate, 3-methylbutanal, 4-hydroxy-3-methoxybenzaldehyde, (E)-beta-damascenone, ethyl hexanoate, ethyl butanoate, ethyl octanoate, 2-methylpropanal, (3S,4S)- cis-whiskylactone, (E, E)-2,4-decadienal, 4-allyl-2-methoxyphenol, ethyl-3-methylbutanoate, and ethyl 2-methylpropanoate showed the highest values. The overall aroma of the Bourbon whisky could be mimicked by an aroma recombinate consisting of the 26 key odorants in their actual concentrations in whisky using water/ethanol (6:4 by vol.) as the matrix. Omission experiments corroborated the importance of, in particular, 4-hydroxy-3-methoxybenzaldehyde, (3S,4S)-cis-whiskylactone, ethanol, and the entire group of esters for the overall aroma of the Bourbon whisky. |
| Databáze: | OpenAIRE |
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