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Quantitative Analysis by Gas Chromatography-Mass Spectrometry and Migration Characteristics of Phthalates and Adipates in Edible Oils

CAI Yan1, ZHAO Jia-qing1, HE Xiao-yu2, YANG Zhen-feng1,*   

  1. 1. College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, China;
    2. Ningbo Entry-Exit Inspection and Quarantine Bureau, Ningbo 315012, China
  • Online:2014-06-25 Published:2014-07-03
  • Contact: YANG Zhen-feng

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Abstract:

In this study, phthalates and adipates in plastic-packaged edible oils were analyzed by gas chromatography-mass
spectrometry in the selected ion monitoring mode (GC-MS-SIM) following ultrasonic-assisted organic solvent extraction,
and the migration of phthalates and adipates was studied quantitatively at different temperatures. The results showed that
under the optimized experimental conditions, the recoveries and precision of 21 phthalate acid esters (PAEs) and adipate acid
esters (AEs) were in the ranges of 82.74%–111.01% and 2.56%–6.01%, respectively, and the limits of detection (LOD) were
in the range of 0.28–14.25 μg/L. Commercial corn oil was detected to contain mainly dimethyl phthalate (DMP), dibutyl
phthalate (DBP), bis-(2-ethylhexyl) phthalate (DEHP) and bis-(2-ethylhexyl) adipate (DEHA) due to the migration from the
packaging material, and the amount of migration was increased gradually over time at different temperatures.

Key words: edible oil, phthalate acid esters, adipate acid esters, gas chromatography-mass spectrometry (GC-MS), migration

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