Simultaneous accelerated solvent extraction and purification for the determination of 13 organophosphate esters in soils by gas chromatography-tandem mass spectrometry
Through the optimization of extraction, purification, and determination parameters, a reliable and convenient analytical method for the simultaneous determination of 13 organophosphate esters in soils was developed. The method is based on one-step extraction and purification by accelerated solvent extraction and analysis by gas chromatography-ion trap tandem mass spectrometry. Under the optimal conditions, the method detection limits and method quantitation limits ranged from 0.10 to 0.22 ng/g and from 0.33 to 0.72 ng/g, respectively. The recoveries obtained were in the range of 81.7–107%, and the relative standard deviations were less than 12%. As compared to other methods, this proposed method was simple and time and solvent saving. The developed method was successfully applied to analyze organophosphate esters in soil samples collected from Liaohe estuarine wetland, China. Thirteen organophosphate esters were detected in all of the soil samples which indicated that Liaohe estuarine wetland has polluted by organophosphate esters.
KeywordsOrganophosphate esters Gas chromatography-tandem mass spectrometry Ion trap mass analyzer Accelerated solvent extraction Soils
We are grateful to the financial support from the Natural Science Foundation of Liaoning Province (No. 20170520384) and the National Program on Key Basic Research Project of China (973 Program) (No. 2014CB441100). The funder had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
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