title: Discrimination of adulterated milk based on two-dimensional correlation spectroscopy (2D-COS) combined with kernel orthogonal projection to latent structure (K-OPLS).
abstract: A new method for discrimination analysis of adulterated milk and pure milk is proposed by combining two-dimensional correlation spectroscopy (2D-COS) with kernel orthogonal projection to latent structure (K-OPLS). Three adulteration types of milk with urea, melamine, and glucose were prepared, respectively. The synchronous 2D spectra of adulterated milk and pure milk samples were calculated. Based on the characteristics of 2D correlation spectra of adulterated milk and pure milk, a discriminant model of urea-tainted milk, melamine-tainted milk, glucose-tainted milk, and pure milk was built by K-OPLS. The classification accuracy rates of unknown samples were 85.7, 92.3, 100, and 87.5%, respectively. The results show that this method has great potential in the rapid discrimination analysis of adulterated milk and pure milk.
authors.affiliation: State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, China.
authors.forename: Renjie
authors.initials: R
authors.lastname: Yang
authors.forename: Rong
authors.initials: R
authors.lastname: Liu
authors.forename: Kexin
authors.initials: K
authors.lastname: Xu
authors.forename: Yanrong
authors.initials: Y
authors.lastname: Yang
mesh_terms: D000818:Animals; D016002:Discriminant Analysis; D005504:Food Analysis / Q000379:methods*; D005506:Food Contamination / Q000032:analysis*; D005947:Glucose; D007091:Image Processing, Computer-Assisted / Q000379:methods; D008892:Milk / Q000737:chemistry*; D013057:Spectrum Analysis / Q000379:methods*; D014227:Triazines; D014508:Urea
chemical_list: D014227:Triazines; D014508:Urea; D005947:Glucose; C011907:melamine