Identification of Wine of Origins Using Rare Earth Element Fingerprinting
Article
Figures
Metrics
Preview PDF
Reference
Related
Cited by
Materials
Abstract:
In this study, in order to explore the feasibility of using rare earth element fingerprinting to identify wine of origins, inductively coupled plasma-mass spectrometry (ICP-MS) was employed to measure the contents of 15 rare earth elements in 228 wine samples from three origins. The data were analyzed by correlation analysis, analysis of variance (ANOVA), and discriminant analysis. The wine of origin was significantly correlated with the rare earth element contents (p < 0.01), while the rare earth element contents were significantly different for the three origins (p < 0.001). The highest rare earth element content was found in the wines from Tonghua, followed by wines from the eastern foot of the Helan Mountains, and the lowest was found in the wines from Shacheng. The cross-validated accuracy rates of the wines from Shacheng, the eastern foot of the Helan Mountains, and Tonghua, using Fisher linear discriminant analysis (FLD), were 92.98%, 98.25%, and 100.00%, respectively, while the accuracy rates by external validation were 84.21%, 89.47%, and 100.00%, respectively. The discrimination capacity of partial least squares discriminant analysis (PLS-DA) was slightly lower; the cross-validated accuracy rates of the three wine origins were 82.46%, 98.25%, and 91.23%, respectively, while the accuracy rates by external validation were 73.68%, 84.21%, and 100.00%, respectively. Therefore, it is possible to identify wine of origins by rare earth element fingerprinting and multivariate statistical analysis.
