目的建立雾霾PM2.5中痕量7种指示性多氯联苯的微波辅助萃取气相色谱三重四极杆串联质谱(GC-MS/MS)检测方法。方法采样后的雾霾PM2.5玻璃纤维滤膜经微波辅助萃取,佛罗里硅土柱净化后,用GC-MS/MS测定。结果 7种指示性多氯联苯在0.5~100μg/L范围内线性良好,线性回归系数r≥0.999,仪器检出限为0.03~0.06μg/L,方法检出限为0.042~0.084 pg/m~3,加标回收率为74.5%~94.5%,相对标准偏差RSD(n=6)为2.1%~3.6%。结论该方法灵敏、准确,有效去除了基质干扰,适用于雾霾PM2.5中7种指示性多氯联苯的测定。 Objective To establish a GC-MS / MS method for the determination of seven trace PCBs in haze PM2.5 by microwave-assisted extraction. Methods The haze PM2.5 glass fiber filter after microwave-assisted extraction was purified by Florisil silica column and determined by GC-MS / MS. Results The linearity of seven indicated polychlorinated biphenyls in the range of 0.5-100 μg / L was good with a linear regression coefficient of r ≥ 0.99 and a detection limit of 0.03-0.06 μg / L. The detection limits were 0.042-0.084 pg / m ~ 3, the spiked recoveries ranged from 74.5% to 94.5%, and the relative standard deviations RSD (n = 6) ranged from 2.1% to 3.6%. Conclusion The method is sensitive, accurate and effective in removing matrix interferences and is suitable for the determination of 7 indicative PCBs in haze PM2.5.