加速溶剂萃取-QuEChERS法测定高活性干酵母粉中12种有机持久污染物残留

建立了加速溶剂萃取（ASE）-QuEChERS-气相色谱-质谱法测定高活性干酵母粉中六氯苯、α-666、七氯等12种有机持久污染物（POPs）的分析方法。样品经乙腈加速溶剂萃取，N-丙基乙二胺（PSA）净化，气相色谱-质谱法选择离子监测模式（GC-MS-SIM）检测。结果表明，12种POPs在0.025~2.500 μg/mL范围内线性关系良好，相关系数R2≥0.992，在3个添加水平（0.05、0.25、1.00 mg/kg）的平均回收率在74.5%~111.7%之间，相对标准偏差（RSDs）为3.1%~11.3%（n=6），检出限（LODs）为0.002~0.009 mg/kg。本方法操作简便、快速、节省溶剂，能够满足高活性干酵母粉中12种POPs残留检测需求。
A method for the simultaneous determination of 12 persistent organic pollutants（POPs） for example hexachlorobenzene，α-666，heptachlor，etc in highly active dry yeast powder was developed using accelerated solvent extraction（ASE）-QuEChERS-gas chromatography-mass. The Sample was extracted by acetonitrile with accelerated solvent extraction apparatus，and then cleaned up by PSA. The qualification and quantification of target compound were performed by gas chromatography-mass in selected ion monitoring mode（GC-MS-SIM）.The results show that the 12 POPs were linear in the range of 0.025~2.500 μg/mL with good correlation coefficients（R2≥0.992）. The average recoveries of the 12 POPs in highly active dry yeast powder were 74.5%~ 111.7 % with relative standard deviations（RSDs，n=6） of 3.1%~11.3%，at the spiked level of 0.05，0.25，1.00 mg/kg. The limits of detection of the method（LODs）were 0.002~0.009 mg/kg. The method is convenient operation，rapid，saving on solvent ，could meet determination of 12 POPs residual in highly active dry yeast powder