2011-2013年大连市涉苯企业三苯检测结果分析

Testing results of benzene,toluene and xylene related enterprises in Dalian 2011- 2013

目的了解大连市2011-2013年企业车间空气中三苯(苯、甲苯、二甲苯)污染现状,防止发生职业中毒和控制职业病危害。方法对2011-2013年间委托检测的101家涉苯企业的三苯检测结果进行分析。结果2011-2013年三苯检测合格率分别为97.61%、98.50%和99.04%;甲苯、二甲苯的检出率明显高于苯的检出率,3种毒物检出率比较差异有统计学意义(χ2=145.18,P<0.05);2011-2013年甲苯、二甲苯的检出率逐年下降,差异有统计学意义(χ2=13.57,P<0.05)。结论 2011-2013年大连市涉苯企业三苯超标现象依然存在,在控制苯使用的同时,应重视降低甲苯和二甲苯的超标率和检出率。

Objective To investigate the current status of benzene, toluene and xylene contamination in the workplace air of enterprises in Dalian 2011 -2013 and prevent occupational poisoning and control occupational hazards. Methods Air sur- veillance results were analyzed the in workplaces of 101 enterprises using benzene, toluene and xylene during 2011 - 2013. Results The qualified rates of benzene, toluene and xylene during 2011 -2013 were 97.61%, 98. 50% and 99.04% ;The detective rates of toluene and xylene were obviously high than that of benzene, differences among the detective rates of three poison materials were significant（X^2 = 145.18 ,P 〈0.05 ） ;The detective rates of toluene and xylene were de- clining year by year, the differences were significant（x^2 = 13.57 ,P 〈 0.05 ）. Conclusion The phenomenon of over - stand- ard rate of benzene still exists in enterprises in Dalian. The enterprises should emphasize on reducing the toluene and xy- lene in workplace.