Geographical Origin Traceability and Origin Confirmation of Specialty Agricultural Product Lanzhou Lily (Lilium davidii var. unicolor)

The place of production is closely related to the quality, safety and nutritional quality of Lanzhou lily (Lilium davidii var. unicolor), and its geographical origin traceability and origin confirmation is beneficial to the implementation of the protection of the place of production, the fidelity of characteristic products and the sustainable development of the industry. In this study, isotope ratio mass spectrometry (IRMS) and inductively coupled plasma mass spectrometry (ICP-MS) were used to determine the ratios of 3 stable isotopes (δ13C, δ15N, δ18O) and the content of 16 mineral elements (K, Mg, Ca, Na, B, Fe, Zn, Al, Mn, Cu, Mo, Cr, Cd, Se, As, Pb) in samples from the four main producing areas of Lanzhou lily. Combining principal component analysis (PCA), orthogonal partial least squares discrimination analysis (OPLS-DA) and linear discriminant analysis (linear discriminant analysis, LDA), the classification model of Lanzhou lily from different producing areas was constructed to verify the geographical o