Chen, Tong published the artcileStudy on discrimination of different grades of rapeseed oil based on flavor fingerprint, Related Products of pyrazines, the main research area is rapeseed oil volatile organic compound flavor principal component analysis.
In this work, Gas chromatograph-Mass Spectrometry (GC-MS) combined with solid phase microextraction technol. was used to analyze the difference of volatile organic compounds (VOCs) in rapeseed oil of different grades, and the relationship between changes of VOCs and refining process were also investigated in order to construct a non-linear model, which could realize rapid and accurate discrimination of different grade rapeseed oils. 124 rapeseed oil samples with different grades were collected and analyzed by GC-MS technol. and 55 VOCs were identified and selected as variables to characterize the internal quality information of rapeseed oils. Then, principal component anal. (PCA) method was used to extract useful features and reduce data dimensionality, and finally a discriminant model was built using linear discriminant anal. (LDA) algorithm. The correct recognition rate of sample set was close to 94.59%. The results showed that the proposed method is promising in discriminating different grades of vegetable oils. Besides, it provides a theor. basis for studying the relationship between VOCs composition and vegetable oil quality.
Acta Chromatographica published new progress about Chemometrics. 14667-55-1 belongs to class pyrazines, name is 2,3,5-Trimethylpyrazine, and the molecular formula is C7H10N2, Related Products of pyrazines.