Chinese Journal of Chromatography

Chinese Journal of Chromatography

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Matrix Solid-Phase Dispersion and Gas Chromatography/Mass
Spectrometry for the Determination of Phthalic
Acid Esters in Vegetables

WANG Minglin1, KOU Lijuan1, ZHANG Yuqian1, SHI Yanxi2   

  1. 1.College of Food Science and Engineering, Shandong Agricultural University, Taian 271018, China;
    2.College of Resources and Enviroment, Laiyang Agricutural College, Qingdao 266109, China
  • Received:2007-01-11 Revised:2007-02-10 Online:2007-07-30 Published:1985-06-25

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Abstract:

A method based on matrix solid-phase dispersion (MSPD) and gas chromatography/mass spectrometry (GC/MS) to determine dimethyl phthalate (DMP), diethyl phthalate (DEP), di-n-butyl phthalate (DBP), butylbenzyl phthalate (BBP) and di-2-ethylhexyl phthalate (DEHP) in vegetables was developed. The method, which required Florisil as solid dispersion sorbent, graphitized carbon black as purificant and ethyl acetate as eluting solvent, is simple, fast and suitable for the preparation of a large number of samples. The results showed that linearity of response over the five phthalic acid esters was good from 0.05 to 10.00 mg/kg. The recoveries of spiked samples ranging from 76% to 90% and the relative standard deviations ranging from 2% to 7% were obtained. The limits of detection for the method were from 0.01 to 0.024 mg/kg.

Key words: gas chromatography/mass spectrometry (GC/MS), phthalic acid esters, vegetables , matrix solid-phase dispersion