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| Determination of two plasticizers DBP and DEHP in edible oil by GC-MS and its risk exposure assessment |
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| DOI： |
| KeyWord:DBP DEHP gas chromatography-mass spectrometry(GC-MS) edible oil plasticizer Monte Carlo risk assessment |
| FundProject:国家重点研发计划子课题（2018YFC1603405-02）；浙江省自然科学基金基础公益研究计划项目（LGN18C140002） |
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| Abstract: |
| A method for the simultaneous determination of two plasticizers DBP and DEHP in edible oil by GC-MS was established. 114 batches of edible oil samples were detected, and the Crystal Ball software based on Monte Carlo statistical simulation method was used to evaluate the risk of the test results, and calculate the daily average exposure and risk index of DBP and DEHP under different percentiles. The resutls showed that the sample was extracted by acetonitrile, then the extract was dried with nitrogen at 40 ℃, redissolved by 2.0 mL n-hexane, and purified with 40 mg C18 and 60 mg PSA, then determined by GC-MS under the conditions of Agilent HP-5MS (30 m×0.25 mm，0.25 μm), electron impact ion source (EI) and single ion monitoring (SIM) mode. The calibration curves of DBP and DEHP showed good linearity in the range of 0.084 6-1.353 6 μg/mL and 0.120 9-1.934 4 μg/mL respectively, and the linear correlation coefficient was above 0.99. The detection limits were 0.06 mg/kg and 0.08 mg/kg respectively. The average recoveries of three mass concentrations ranged from 88.3% to 111.2%, and the precision were between 2.7% and 5.6%. Among the 114 batches of edible oil samples, the plasticizer content of 9 batches of samples exceeded the risk value, and the two plasticizers had different levels of risk. DBP had a higher risk index than DEHP, and the risk of DBP to children aged 7-10 was the highest, so corresponding measures should be taken. In addition, the plasticizers content in edible oil had the greatest impact on the risk index. |
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