title: Classification of geographical origins and prediction of δ13C and δ15N values of lamb meat by near infrared reflectance spectroscopy.
abstract: Near infrared spectroscopy (NIRS) combined with chemometric analysis was investigated for its potential to classify the geographical origin and predict δ(13)C and δ(15)N values of lamb meat samples (n=99) from three pastoral regions and two agricultural regions of China. Principal component analysis (PCA), discriminant partial least squares analysis (D-PLS), linear discriminant analysis (LDA) and partial least squares regression (PLSR) were used for data analysis. D-PLS and LDA correctly classified 100% of the both pastoral and agricultural region samples, and gave a total correct classification of 88.9% and 75% to the five individual region samples, respectively. The best PLSR calibration models for predicting δ(13)C and δ(15)N of lamb meat were obtained with the determination coefficient (R(2)) 0.76 and 0.87, respectively. These results show that NIRS combined with chemometrics can be used as a rapid and effective method to discriminate the geographical origin and estimate the δ(13)C and δ(15)N of lamb meat.
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. xianyun730@163.com
authors.forename: Shumin
authors.initials: S
authors.lastname: Sun
authors.forename: Boli
authors.initials: B
authors.lastname: Guo
authors.forename: Yimin
authors.initials: Y
authors.lastname: Wei
authors.forename: Mingtao
authors.initials: M
authors.lastname: Fan
mesh_terms: D000818:Animals; D002247:Carbon Isotopes / Q000032:analysis*; D002681:China; D005843:Geography; D008460:Meat / Q000032:analysis* / Q000592:standards; D009587:Nitrogen Isotopes / Q000032:analysis*; D011786:Quality Control; D012756:Sheep; D019265:Spectroscopy, Near-Infrared / Q000379:methods*
chemical_list: D002247:Carbon Isotopes; D009587:Nitrogen Isotopes