Journal
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
Volume 410, Issue 27, Pages 7077-7084Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s00216-018-1308-z
Keywords
Matrix solid-phase dispersion; Gas chromatography-tandem mass spectrometry; Organophosphate esters; Vegetables
Funding
- China Postdoctoral Science Foundation [2018M630304]
- Natural Science Foundation of Liaoning Province [20170520384]
- National Program on Key Basic Research Project of China (973 Program) [2014CB441100]
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In this study, matrix solid-phase dispersion coupled with gas chromatography-tandem mass spectrometry (GC-MS/MS) was developed for the analysis of 23 organophosphate esters (OPEs) in vegetables. Under the optimal conditions, 0.5 g vegetables was dispersed with use of 2 g Florisil, 2 g anhydrous sodium sulfate, and 0.1 g graphitized carbon black, and it was transferred to an empty solid-phase extraction cartridge. The analytes were eluted with 15 mL n-hexane/acetone (1: 1, v/v) and analyzed by GC-MS/MS. The method detection limits and quantitation limits ranged from 0.05 to 0.33 ng/g and from 0.16 to 1.10 ng/g, respectively. The recoveries ranged from 65.1% to 109.1%, and the relative standard deviations were less than 15%. The analysis of eight kinds of vegetables shows that the vegetables had been contaminated by OPEs; the concentrations of the sum of the OPEs ranged from 5.89 to 26.8 ng/g. The proposed method is applicable to analyze OPEs in vegetables.
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