Sun Shumin, Guo Boli, Wei Yimin
College of Food Science and Technology, Henan University of Technology, No. 1 Lianhua Rd, High-tech Industrial Development Zone, Zhengzhou 450001, PR China.
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.
Food Chem. 2016 Dec 15;213:675-681. doi: 10.1016/j.foodchem.2016.07.013. Epub 2016 Jul 5.
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.
采用同位素比值质谱仪（IRMS）测定了来自中国五个不同地区的两种饲养方式下羊肉和羊毛样品中的碳、氮和氢同位素组成，以研究其按地理来源对羊肉进行溯源的潜力。不同地区羔羊组织中的δ(13)C、δ(15)N和δ(2)H值存在显著差异，其中δ(13)C值与羔羊饲料的δ(13)C值高度相关（p<0.01），δ(2)H值与羔羊饮用水显著相关（p<0.05）。此外，羔羊肌肉的δ(13)C、δ(15)N和δ(2)H值与羊毛样品均高度相关。分别结合羔羊肌肉和羊毛的碳、氮、氢同位素，得到的总正确分类率分别为88.9%和83.8%。这些结果表明，多元素同位素在识别羊肉地理来源方面是有效的。此外，肌肉和毛发组织均可用于羔羊溯源。
