[Feasibility of using NIR spectroscopy to detect melamine in milk].
In the present study, 22 certified milk samples without melamine were collected, then 50 adulterated milk samples with added different content of melamine (0.1-1 500 mg x kg(-1)) were prepared. The near-infrared (NIR) spectra of these milk samples were measured. The possibility of using NIR spectra to detect melamine in milk was studied. Partial least square regression (PLSR) was applied to construct the calibration model between NIR spectra and the content of melamine. The results showed that NIR spectroscopy can not accurately predict the content of melamine because of its poor detection limit. However, the combination of NIR spectra and partial least square-discriminate analysis (PLS-DA) was applied to differentiate the certified milk samples and the adulterated milk sample. The classification accuracy was 100%. Therefore, NIR spectra could be used to preliminarily detect whether the milk was adulterated with melamine. As a complementary detecting method to the high performance liquid chromatography (HPLC), NIR spectra could improve the detecting efficiency of milk
Dong
Yi-Wei
YW
Institute of Environment and Sustainable Development in Agriculture, The Chinese Academy of Agricultural Sciences, Key Laboratory of Agro-Environment & Climate Change, Ministry of Agriculture, Beijing 100081, China.
Tu
Zhen-Hua
ZH
Zhu
Da-Zhou
DZ
Liu
Ya-Wei
YW
Wang
Ya-Nan
YN
Huang
Jin-Li
JL
Sun
Bao-Li
BL
Fan
Zhong-Nan
ZN
D000818:Animals; D005506:Food Contamination / Q000032:analysis*; D016018:Least-Squares Analysis; D008892:Milk; D019265:Spectroscopy, Near-Infrared; D014227:Triazines / Q000032:analysis*
D014227:Triazines; C011907:melamine