Abstract:By analyzing the mass fraction characteristics of 25 mineral elements in Pucheng rice, rice from Jiangxi region, rice from Hubei region, rice from Hunan region, and rice from other Fujian region, 14 mineral elements with significant differences were screened out. After dimension reduction of mineral elements by principal component analysis (PCA) and orthogonal partial least-squares discriminant analysis (OPLS-DA), the results of linear discriminant analysis (LDA) after dimension reduction by PCA were found to be superior to OPLS-DA. Consequently, a Pucheng rice origin traceability model of “difference analysis + principal component analysis + discriminant analysis” was established, and six characteristic mineral elements, i.e., vanadium(V), cobalt (Co), arsenic(As), rubidium(Rb), silver(Ag), and cesium(Cs), were selected. The overall correct discrimination accuracy of the back-substitution test for the discriminant model was 98.1%, and the overall correct discrimination accuracy of the cross-validation was 97.1%. It can accurately identify Pucheng rice, providing a reference for the origin traceability and quality control of Pucheng rice.
