Abstract:In order to explore the differences between lead isotope and related elements in organic farming and conventional culture, the possibility of traceability of organic chicken samples was explored. In this study, two different feeding methods, organic farming and conventional breeding, were used for the same breeds of chickens. The lead isotope ratios and related element contents in organic chicken and common chicken samples were determined by inductively coupled plasma mass spectrometry. The results of variance analysis showed that the lead isotope ratios of 204Pb/206Pb and contents of P, Zn, Fe, Mn, Mg, Ca, Cu, Na, K were significantly different (p<0.05). The principal component analysis showed that Zn, Mn, Mg, Ca, Cu, Na, and K were characteristic inorganic elements in organic chicken and common chicken samples. Meanwhile, cluster analysis could divide chicken samples into two categories:organic farming and conventional breeding, and the initial group correcting rate obtained by discriminant analysis was 100.0%, and the cross validation accuracy was 90.0%. The lead isotope ratios of 204Pb/206Pb, and related element contents (P, Zn, Fe, Mn, Mg, Ca, Cu, Na, K) could be used to identify the effective traceability of organic chickens. The results can provide new identification methods for organic chickens.