title: Origin assignment by multi-element stable isotopes of lamb tissues.
abstract: The carbon, nitrogen and hydrogen isotopic compositions in lamb meat and wool samples under two feeding regimes from five different regions of China were determined by IRMS, which is to investigate their potential for assigning the lamb meat according to geographical origins. The δ(13)C, δ(15)N and δ(2)H values in lamb tissues had significant differences among different regions, with the δ(13)C value is highly related to that of the lamb feeds (p<0.01) and the δ(2)H value is significantly correlated with lamb drinking water (p<0.05). Moreover, δ(13)C, δ(15)N and δ(2)H values of lamb muscle are all highly correlated with the wool samples. A total correct classification of 88.9% and 83.8% were obtained from the combination of C, N and H isotopes of lamb muscle and wool, respectively. These results demonstrate that multi-element isotopes are effective in identifying the geographical origin of lamb meat. Moreover, both muscle and hair tissue can be used for lamb traceability.
authors.affiliation: College of Food Science and Technology, Henan University of Technology, No. 1 Lianhua Rd, High-tech Industrial Development Zone, Zhengzhou 450001, PR China. Electronic address: xianyun730@163.com.
authors.forename: Shumin
authors.initials: S
authors.lastname: Sun
authors.affiliation: Comprehensive Key Laboratory of Agro-Products Processing, Ministry of Agriculture, Institute of Agro-Products Processing Science and Technology, Chinese Academy of Agricultural Sciences, P.O. Box 5109, Beijing 100193, PR China. Electronic address: guoboli.caas@yahoo.com.
authors.forename: Boli
authors.initials: B
authors.lastname: Guo
authors.affiliation: Comprehensive Key Laboratory of Agro-Products Processing, Ministry of Agriculture, Institute of Agro-Products Processing Science and Technology, Chinese Academy of Agricultural Sciences, P.O. Box 5109, Beijing 100193, PR China. Electronic address: weiyimin36@hotmail.com.
authors.forename: Yimin
authors.initials: Y
authors.lastname: Wei
mesh_terms: D000818:Animals; D002247:Carbon Isotopes / Q000032:analysis*; D002681:China; D003903:Deuterium / Q000032:analysis*; D008460:Meat / Q000032:analysis*; D009587:Nitrogen Isotopes / Q000032:analysis*; D012756:Sheep; D014935:Wool / Q000737:chemistry*
chemical_list: D002247:Carbon Isotopes; D009587:Nitrogen Isotopes; D003903:Deuterium
keywords: Lamb defatted muscle; Origin assignment; Stable isotopes; Wool