北京市大兴区工矿企业工作场所中苯、甲苯和二甲苯检测结果

目的了解北京市大兴区工矿企业中苯、甲苯、二甲苯工作场所职业病危害现状,为行政部门的监督管理提供依据,同时引起管理者的重视,改善工人的工作环境。方法依据国家有关标准、规范的要求对工作场所进行检测。按《工作场所有害物质监测方法》的要求,采用活性炭管采集车间空气的样品进行分析。结果 2005—2010年该区存在苯、甲苯、二甲苯职业病危害因素的有89家企业,行业分布以印刷业、家具制造业为主,在所有行业中占到90.60%,其他行业仅占9.40%;检测样品447个,苯样品浓度检测结果主要集中在6 mg/m3以下,甲苯、二甲苯样品浓度检测结果主要集中在50mg/m3以下。苯、甲苯时间加权平均(TWA)浓度和短时间接触浓度(STEL)的合格率在行业之间差异有统计学意义。家具制造业合格率均低于印刷和其他企业(P0.05)。结论目前,该区工作场所中苯、甲苯、二甲苯样品检测合格率虽然均在80%以上,但仍有超标现象,应继续加强监管工作。

Testing results of benzene,toluene and xylene in workplace of industrial and mining enterprises in Daxing District of Beijing City

Objective]To understand the present situation of occupational hazards of benzene,toluene and xylene in workplace of industrial and mining enterprises in Daxing District of Beijing City,to provide evidence for supervision and management of the administrative departments,to attract their attention and improve the operation environment of workers.Methods]The workplace investigation was based on the relevant national standards and norms.According to the "Examining Method of Harmful Substances in Working Place",the air sample was collected by activated charcoal tube.Results] There were 89 enterprises had occupational hazards of benzene,toluene and xylene from 2005-2010.According to the industrial classification,printing industry and furniture manufacturing occupied a considerable proportion,reached 90.60%,other industry occupied 9.40%.A total of 447 samples were detected,benzene concentration mainly concentrated under the 6 mg/m3,while toluene,xylene sample were mainly under 50 mg/m3.TWA concentration and STEL qualified rate of benzene and toluene were significantly different between industries.The qualified rate of furniture manufacturing was lower than printing and other businesses(P<0.05).Conclusion]Currently,although the qualified rates of benzene,toluene,xylene are above 80% in workplaces of this district,there is something over standard.Therefore,the supervision should be strengthened continuously.in the workplace sample test pass rate in more than 80%