Vintage analysis of Chinese Baijiu by GC and 1H NMR combined with multivariable analysis was written by Li, Yicong;Fan, Shuangxi;Li, Anjun;Liu, Guoying;Lu, Wei;Yang, Bo;Wang, Fengxian;Zhang, Xin;Gao, Xiaojuan;Lu, Zhiyuan;Su, Ning;Wang, Guanghao;Liu, Yinuo;Ji, Xin;Xin, Peng;Li, Guohui;Wang, Daobing;Lu, Fuping;Zhong, Qiding. And the article was included in Food Chemistry in 2021.Electric Literature of C11H22O2 The following contents are mentioned in the article:
Economical-driven counterfeit and inferior aged Chinese Baijiu has caused serious concern of publicity in China. In this study, a total of 167 authentic Chinese Baijiu samples with different vintages including 3 flavor types were carefully collected. Gas chromatog. (GC) was used to determine main volatile components and proton NMR (1H NMR) spectroscopy was employed to obtain non-targeted fingerprints of Chinese Baijiu samples. Partial least squares regression (PLSR) models, which were confirmed by internal and external validation, were established for effectively identifying actual storage vintage of Chinese Baijiu with various brands, flavor types. Centering (Ctr), pareto scaling (Par), unit variance scaling (UV) data pretreatment methods, principal components (PCs), and three modified variable selection methods were proposed to successfully optimize the vintage model and effectively extract important vintage characteristic factors. This study demonstrated that NMR and GC combined with multivariate statistical anal. are effective tools for validating vintage authenticity of Chinese Baijiu. This study involved multiple reactions and reactants, such as Isopentyl hexanoate (cas: 2198-61-0Electric Literature of C11H22O2).
Isopentyl hexanoate (cas: 2198-61-0) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Liquid esters of low volatility serve as softening agents for resins and plastics. Esters also include many industrially important polymers. Polymethyl methacrylate is a glass substitute sold under the names Lucite and Plexiglas; polyethylene terephthalate is used as a film (Mylar) and as textile fibres sold as Terylene, Fortrel, and Dacron.Electric Literature of C11H22O2
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics