Analysis of volatile odor compounds and aroma properties of European vinegar by the ultra-fast gas chromatographic electronic nose was written by Liu, Ruo-Chen;Li, Rong;Wang, Ying;Jiang, Zi-Tao. And the article was included in Journal of Food Composition and Analysis in 2022.Electric Literature of C6H12O2 This article mentions the following:
Vinegar is a very popular condiment with different species and aroma profiles. Eighty-three volatile odor compounds (VOCs) were identified from European vinegar using ultra-fast gas chromatog. electronic nose (UFGC E-nose), of which there were 61 VOCs with odor activity value (OAV) ≥ 1. Among the 61 VOCs, acetic acid, Et isovalerate, propionaldehyde, butanoic acid, Et cinnamate, and guaiacol contributed significantly to the aroma property and type of European vinegar. There were obvious clustering trends of apple vinegar, wine vinegar, and balsamic vinegar in principal component anal. (PCA). The clustering of the vinegar-like groups was more obvious in orthogonal partial least squares discriminant anal. (OPLS-DA). The volatile markers discriminating vinegar, including acetic acid, propionic acid, pyrazine, furfural, iso-Pr alc., and so on, were screened out by variable importance for the projection (VIP). These results demonstrated that UFGC E-nose is a novel, rapid and non-destructive anal. tool and can also be used for identifying aroma compounds and tracing the food species. In the experiment, the researchers used many compounds, for example, Methyl2-methylbutyrate (cas: 868-57-5Electric Literature of C6H12O2).
Methyl2-methylbutyrate (cas: 868-57-5) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.Electric Literature of C6H12O2
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics