目的建立工作场所空气中百菌清的高效率采集方法。方法采用聚氨酯采样管在空气中采集空气样品,环己烷溶剂解吸,采用气相色谱法定量测定百菌清的含量。结果该方法百菌清的检出限是0.01 mg/L,最低检测浓度为0.01 mg/m~3(以采样15 L空气样品计);相对标准偏差为1.5%~4.4%,平均解析效率为88%,聚氨酯采样管的穿透容量为124μg,样品在室温条件下可保存1 d。结论该方法适用于工作场所空气中百菌清的测定。 Objective To establish a high efficiency collection method of chlorothalonil in workplace air. Methods Polyurethane sample tube was used to collect air samples in the air and cyclohexane solvent was desorbed. The content of chlorothalonil was determined by gas chromatography. Results The detection limit of chlorothalonil was 0.01 mg / L and the lowest detection limit was 0.01 mg / m ~ 3 (with 15 L air sample). The relative standard deviation was 1.5% ~ 4.4%. The average analytical efficiency was 88%, polyurethane sample tube penetration capacity of 124μg, the sample can be stored at room temperature for 1 d. Conclusion This method is suitable for the determination of chlorothalonil in workplace air.