目的建立工作场所空气中多氯联苯类化合物的气相色谱-质谱(GC-MS)检测方法。方法空气中的多氯联苯用超细玻璃纤维滤膜采集,用正己烷和丙酮洗脱,经色谱柱分离,质谱检测器检测,以保留时间和特征离子定性,峰面积定量。结果空气中的多氯联苯在5~500 ng/ml范围内有良好的线性关系,相关系数r=0.999 4,最低检出浓度为0.11 mg/m3(以采集15 L空气样品计),批内精密度RSD为3.2%~4.9%,批间精密度RSD为4.4%~6.2%,加标回收率为91.6%~94.9%。结论该方法灵敏、准确,适用于工作场所空气中多氯联苯类化合物的测定。 Objective To establish a gas chromatography-mass spectrometry (GC-MS) method for the determination of polychlorinated biphenyls (PCBs) in workplace air. Methods PCBs in the air were collected with an ultrafine glass fiber filter, eluted with n-hexane and acetone, separated by a chromatographic column and detected by a mass spectrometer, and characterized by retention time and characteristic ionization and peak area. Results A good linear relationship was found between 5 and 500 ng / ml of PCBs in the air with a correlation coefficient of r = 0.999 4 and a minimum detectable concentration of 0.11 mg / m 3 (for 15 L air samples) The RSD of intra-precision was 3.2% ~ 4.9%, the RSD of inter-batch precision was 4.4% ~ 6.2%, and the recoveries were 91.6% ~ 94.9%. Conclusion The method is sensitive and accurate and suitable for the determination of polychlorinated biphenyls in the air of the workplace.