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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 understand the status of the benzene, toluene and xylene pollution in the air of enterprises in the workshop of Dalian in 2011-2013 so as to prevent occupational poisoning and control occupational hazards. Methods The triphenyl test results of 101 companies involved in benzene commissioned from 2011 to 2013 were analyzed. Results The qualified rate of triphenol detection was 97.61%, 98.50% and 99.04% respectively from 2011 to 2013. The detection rates of toluene and xylene were significantly higher than those of benzene, and the detection rates of the three toxicants were significantly different (χ2 = 145.18, P <0.05). The detection rates of toluene and xylene in 2011-2013 decreased year by year with a significant difference (χ2 = 13.57, P <0.05). CONCLUSIONS: Excessive triphenyl levels in benzene-bearing enterprises in Dalian during 2011-2013 still exist. In controlling the use of benzene, attention should be paid to reduce the excess and the detection rate of toluene and xylene.