Determination of 7 Polychlorinated Biphenyls in Pepper by GC-MS/MS
Objective:To establish a gas chromatography-tandem mass spectrometry(GC-MS/MS)method for the determination of 7 polychorinated biphenyls(PCBs)in pepper.Method:The sample was extracted with n-hexane-acetone,purified by QuEChRS purification package,and separated by GC-MS/MS.Result:The 7 types of PCBs have a good linear range at a mass concentration of 0 ng·mL-1 to 200 ng·mL-1,and the detection limit and quantification limit of the method can meet the experimental requirements.At three levels of 10 ng·mL-1,50 ng·mL-1,200 ng·mL-1,the average recovery rates were 91.55% to 95.36%,and the relative standard deviation was 1.6% to 3.2% .Conclusion:The method has simple pretreatment,good extraction and separation effect,high recovery rate,and is suitable for rapid monitoring of 7 PCBs residues in pepper.
polychlorinated biphenyls(PCBs)QuEChERSgas chromatography-tandem mass spectrometry(GC-MS)pepper
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