Tracing coffee origin by direct injection headspace analysis with PTR/SRI-MS was written by Yener, Sine;Romano, Andrea;Cappellin, Luca;Granitto, Pablo M.;Aprea, Eugenio;Navarini, Luciano;Mark, Tilmann D.;Gasperi, Flavia;Biasioli, Franco. And the article was included in Food Research International in 2015.Application of 20662-84-4 This article mentions the following:
The headspace of six roasted Coffea arabica coffees, both brew and powder, of different geog. origins (Brazil, Ethiopia, Guatemala, Costa Rica, Colombia, and India) was analyzed by Proton Transfer Reaction-Time of Flight-Mass Spectrometry. For the first time, in the case of coffee, a Switching Reagent Ion System has been used to produce different ionisation agents: H3O+, NO+ and O+2. Significant differences were found among volatile concentrations for the different origins both for powders and brews, in particular high concentrations of terpenes for Ethiopia, sulfur compounds for Colombia and thiazoles for Brazil and India. Effective classification models have been set for the different ionisation modes and data fusion of the data obtained by different reagent ions further reduced the classification errors. In the experiment, the researchers used many compounds, for example, 2,4,5-Trimethyloxazole (cas: 20662-84-4Application of 20662-84-4).
2,4,5-Trimethyloxazole (cas: 20662-84-4) belongs to oxazolidine derivatives. Oxazolidines that are the precursor to bisoxazolidines are in effect mono-oxazolidines. They are also used as moisture scavengers in polyurethane and other systems. Chiral oxazolidines are widely used as chiral auxiliaries, chiral ligands, protecting and/or directing groups in a variety of asymmetric transformations, thanks also to their easy cleavage or their further elaboration possibilities.Application of 20662-84-4
Referemce:
Oxazolidine – Wikipedia,
Oxazolidine | C3H7NO – PubChem