近十年来,聚氯乙烯(PVC)板被广泛用作污水管的防腐蚀内衬。为了解在用热空气枪常规焊接该 PVC 板时能否产生氯乙烯单体(VCM)及作业人员的暴露水平,作者对焊接烟雾进行了分析,同时亦测定了烟雾中的其它成分。本研究包括实验室、车问模拟及现场测试等九种情况的采样测定. For more than a decade, polyvinyl chloride (PVC) panels have been widely used as anti-corrosion linings for sewer pipes. In order to understand whether vinyl chloride monomer (VCM) and workers’ exposure level can be produced when the PVC board is conventionally welded with a hot air gun, the authors analyzed the welding smoke as well as other components of the smoke. This study includes the laboratory, vehicle simulation and field testing of nine cases of sampling determination.