Rapid and Real-time Determination of Polyphenols in Gongju (Chrysanthemum morifolium Ramat.) at Different Storage Periods by Multispectral Imaging System

抄録

Gongju, as one of the most famous Chrysanthemum morifolium Ramat. varieties, is considered to be an herbal tea in Asia. Polyphenols determine the quality of Gongju directly. However, polyphenols are instable during the storage process. The feasibility of using multispectral imaging (MSI) system to detect the content of chlorogenic acid, apigenin, and total flavonoids in Gongju at different storage periods was investigated. Spectral data were analyzed with three chemometrics models, including PLS, SVM, and BPNN. Compared with PLS and BPNN, SVM had the greatest prediction result of chlorogenic acid, apigenin, and total flavonoids with R²_p of 0.843, 0.872, 0.734, and RMSEP of 2.926, 0.059, 1.609 mg/g, respectively. These results suggested the MSI system under the SVM model provided a reliable prediction performance on changes of polyphenols in Gongju during storage, so that given a fast, and non-destructive quality identification method for the chrysanthemum industry.