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The application of directly suspended droplet microextraction for the evaluation of phthalic acid esters in cow's milk by gas chromatography mass spectrometry

文献类型： 外文期刊

作者： Liu, Dan 1 ; Min, Shungeng 1 ; Ping, Hua 2 ; Song, Xiangzhong 1 ;

作者机构： 1.China Agr Univ, Dept Appl Chem, Coll Sci, Beijing 100193, Peoples R China

2.Beijing Res Ctr Agr Stand & Testing, Beijing 100097, Peoples R China

关键词： Phthalic acid esters PAEs;Directly suspended droplet microextraction;DSDME;Milk

期刊名称：JOURNAL OF CHROMATOGRAPHY A （ 影响因子：4.759； 五年影响因子：4.302 ）

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收录情况： SCI

摘要： A simple and rapid method was developed for evaluating 16 phthalic acid esters (PAEs) at the mu g/kg level in a complex milk matrix using directly suspended droplet microextraction-gas chromatography mass spectrometry (DSDME-GC-MS). The different parameters for extraction and for the DSDME experiment were optimized, including You are free to submit the revised manuscript at a later date as a new submission. 10 g/L trichloroacetic acid concentration, 100 mu L cyclohexane micro-droplet organic solvent, 1100 rpm stirring speed, 10 min extraction time and no salt amount. Validation experiments showed good linearity (gamma > 0.9878, 0.002-0.4 mu g/mL), satisfactory precision (RSD < 11%), and good accuracy (relative,recovery of 70.2-108%) when analyzing milk samples using the optimized method. The limits of detection (LODs) ranged between 0.001 and 0.2 mu g/L, and the limits of quantification (LOQs) ranged between 0.003 and 0.7 mu g/L. for 15 PAEs. Dinonyl phthalate (DINP) had a low response and did not have good linearity. The proposed method was successfully applied for the analysis of PAEs in real milk samples. (C) 2016 Elsevier B.V. All rights reserved.

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