Dou, Xinjing published the artcileAdulteration detection of essence in sesame oil based on headspace gas chromatography-ion mobility spectrometry, Application of 2,3,5-Trimethylpyrazine, the main research area is adulteration sesame oil essence gas chromatog ion mobility spectrometry; Adulteration detection; HS-GC-IMS; Marker; Sesame essence; Sesame oil.
Sesame oil is a traditional and delicious edible oil in China and Southeast Asia with a high price. However, sesame oil essence was often illegally added to cheaper edible oils to counterfeit sesame oil. In this study, a rapid and accurate headspace gas chromatog.-ion mobility spectrometry (HS-GC-IMS) method was proposed to detect the counterfeit sesame oil where the other cheap oils were adulterated with essence. Combined with chemometric methods including principal component anal. (PCA), orthogonal partial least squares discriminant anal. (OPLS-DA) and random forest (RF), authentic and counterfeit sesame oils adulterated with sesame essence (0.5%, weight/weight) were easily separated into two groups. More importantly, 2-methylbutanoic acid, 2-furfurylthiol, methylpyrazine, methional, and 2,5-dimethylpyrazine were found to be markers of sesame essence, which were used to directly identify the sesame essence. The determination of volatile compounds based on HS-GC-IMS was proven to be an effective method for adulteration detection of essence in sesame oil.
Food Chemistry published new progress about Adulterants. 14667-55-1 belongs to class pyrazines, name is 2,3,5-Trimethylpyrazine, and the molecular formula is C7H10N2, Application of 2,3,5-Trimethylpyrazine.