Volatile and fixed composition of sulphite-free white wines obtained after fermentation in the presence of chitosan was written by Castro-Marin, Antonio;Buglia, Ana Gabriela;Riponi, Claudio;Chinnici, Fabio. And the article was included in LWT–Food Science and Technology in 2018.Recommanded Product: Ethyl 2-hydroxy-3-phenylpropanoate This article mentions the following:
Consumers are increasingly interested in healthier wines containing reduced levels or totally absent of sulphites. In the present investigation distinct fermentations of white musts either in the presence of chitosan or sulfur dioxide were carried out in order to compare the volatile and fixed composition of the wines produced, and evaluate the impact of chitosan as an alternative to sulfur dioxide. Chitosan promoted a 24 h extended lag-phase and diminished the titratable acidity of wines by about 1 g L-1 as a consequence of the absorption of tartaric and malic acids onto the polymer surface. The volatile composition of wines was analyzed at the end of the alc. fermentation and then after 12 mo of storage in glass bottle. Hexanoic, octanoic and decanoic acids were significantly higher in chitosan added wines, which further contained an increased amount of Et and acetate esters. Results demonstrated that, when added before the alc. fermentation, chitosan may affect both the acidic and volatile composition of wines, likely due to its polycationic behavior and interaction with yeast wall constituents. This also suggests that attention to wine acidic balance should be paid before its use in other vinification steps such as must clarification or wine fining. In the experiment, the researchers used many compounds, for example, Ethyl 2-hydroxy-3-phenylpropanoate (cas: 15399-05-0Recommanded Product: Ethyl 2-hydroxy-3-phenylpropanoate).
Ethyl 2-hydroxy-3-phenylpropanoate (cas: 15399-05-0) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. Because of their lack of hydrogen-bond-donating ability, esters do not self-associate. Consequently, esters are more volatile than carboxylic acids of similar molecular weight.Recommanded Product: Ethyl 2-hydroxy-3-phenylpropanoate
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics