[Determination of 23 phthalate esters in food by solid-phase extraction coupled with gas chromatography-mass spectrometry]

Se Pu. 2012 Jan;30(1):27-32. doi: 10.3724/sp.j.1123.2011.08019.
[Article in Chinese]

Abstract

A method for the simultaneous determination of 23 phthalate esters in food samples by solid-phase extraction coupled with gas chromatography-mass spectrometry (SPE-GC-MS) was developed and evaluated. The samples were extracted with hexane or acetonitrile, and cleaned up with a glass ProElut PSA SPE column. The identification and quantification were performed by GC-MS in selected ion monitoring (SIM) mode. The extraction processes of different foods were investigated. The calibration curves of phthalate esters showed good linearity in the range of 0.05-5 mg/L (0.5-5 mg/L for diisononyl phthalate (DINP), diisodecyl-phthalate (DIDP)) with the correlation coefficients (r) between 0.984 8 and 0.999 6. The limits of detection of phthalate esters in food samples ranged from 0.005 to 0.05 mg/kg (S/N = 3) and the limits of quantification ranged from 0.02 to 0.2 mg/kg (S/N = 10). The average recoveries of 23 analytes spiked in 10 kinds of food matrices ranged from 77% to 112% with the relative standard deviations (RSDs, n = 6) of 4.1%-12.5%. The method is suitable for the determination of 23 phthalate esters simultaneously in foodstuffs with easy operation, high accuracy and precision.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Esters / analysis
  • Food Contamination / analysis*
  • Gas Chromatography-Mass Spectrometry / methods*
  • Phthalic Acids / analysis*
  • Solid Phase Extraction

Substances

  • Esters
  • Phthalic Acids
  • dimethyl phthalate
  • diallyl phthalate
  • diethyl phthalate