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| Pollution traceability in determination of benzo(a)pyrene in edible oil by molecularly imprinted solid phase extraction |
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| DOI： |
| KeyWord:benzo(a)pyrene pollution traceability edible oil molecularly imprinted solid phase extraction |
| FundProject:东莞市社会科技发展一般项目（2020507101631） |
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| Abstract: |
| The pollution traceability analysis of reagents and consumables used in determination of benzo(a)pyrene (BaP) in edible oil by molecularly imprinted solid phase extraction was conducted. The results showed that analytical reagent and rubber in syringe were the main sources of BaP pollution. The average peak areas of dichloromethane (analytical reagent), n-hexane (analytical reagent) and rubber were 0.261, 0.710 mV·min and 2.550 mV·min, respectively, which were 0.9, 2.4 times and 8.7 times of the detection limit of national standard method, bringing serious impact on the test result accuracy. Therefore, it was proposed to use high-speed centrifugation instead of filtration membrane to remove impurities in sample solution, which not only avoided the pollution caused by the syringe, but also ensured the stable operation of the liquid chromatography system to improve the accuracy of the test results. |
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