Abstract:A discriminant model of muskmelon origin was established to provide theoretical basis for geographical origin trace of muskmelon. In this study, the contents of strontium isotopes m（87Sr）∶ m（87Sr） and various mineral elements of melon species in melon samples collected from Hami, Turpan, Bazhou and Aksu of Xinjiang were determined by thermoelectric ionization mass spectrometer and inductively coupled plasma mass spectrometer. The discriminant analysis model was established in combination with principal components and discriminant analysis in stoichiometry to conduct discriminant analysis on melon from different producing areas in Xinjiang. Multiple comparison results showed that Al, Fe and Rb contents of Hami melon were significantly higher than those of Turpan, Bazhou and Aksu. The contents of Ca and Na in melon in Bazhou were significantly higher than those in Turpan, Hami and Aksu. The m（87Sr）∶m（86Sr） of melon in Bazhou and Aksu significantly higher than m（87Sr）∶ m（87Sr） of melon in Hami and Turpan. The discriminant model was establishm（87Sr）∶ m（87Sr）ed based on m（87Sr）∶ m（87Sr） and 8 mineral elements, including Ca, K, Na, V, Cr, Ni, As and Rb. The overall discriminative rates of back-substitution and leave-one-out cross-validation of four-ground melon were 100% and 93.8%, respectively. It could be feasible to discriminate muskmelon from different producing areas in Xinjiang by m（87Sr）∶ m（87Sr） and various mineral elements combined with stoichiometry.
