Detection of Plasticizers in Edible Essence by Near-Infrared Spectrometry
LI Xiang-hui1, YANG Fang2*, LIN Zhen-yu1, QIU Bin1, WANG Dan-hong2
1. MOE Key Laboratory of Analysis and Detection for Food Safety, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, Department of Chemistry, Fuzhou University, Fuzhou 350108, China 2. Fujian Entry-Exit Inspection & Quarantine Bureau of P.R.C, Fuzhou 350001, China
Abstract：Based on the initial near-infrared spectrum of edible essence samples and its mixture with DEHP and DINP, we chose the wavelength ranges of 8 800～8 540 and 7 500～5 085 cm-1 to use the principal component analysis (PCA) method to distinguish these three types of samples. The correct rate of the identification is proved to be 100%. Meanwhile, we measured the content of DEHP and DINP (with the concentration ranging between 0 and 100 mg·kg-1) in the edible essence and established the quantitative analysis model by using partial least squares (PLS). It was found that the relative errors of the prediction results of DEHP and DINP are -1.23%～3% and -1%～3.6%, respectively, and the relative root-mean-square errors of prediction (RRMSEP) of them are 1.39 and 0.98, respectively. This study provides a simple, rapid and accurate method to detect the additive dosage of plasticizing agents in edible essence in the food industry.
李祥辉1，杨 方2*，林振宇1，邱 彬1，王丹红2 . 近红外光谱法应用于食用香精中增塑剂的检测研究 [J]. 光谱学与光谱分析, 2013, 33(03): 690-693.
LI Xiang-hui1, YANG Fang2*, LIN Zhen-yu1, QIU Bin1, WANG Dan-hong2 . Detection of Plasticizers in Edible Essence by Near-Infrared Spectrometry . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2013, 33(03): 690-693.
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