近十余年,由于工艺改革和技术革新的不断发展,对造血系统和中枢神经系统有较明显作用的苯逐渐被低毒的苯、甲苯和二甲苯的混苯所取代。1981年全国普查结果表明,接触纯苯的工人只占4.9％,而接触混苯的工人已占95.1％,因此,混苯对作业工人的影响逐渐被重视。文献报道,长期接触混合有机溶剂可以影响工人的心理功能,主 In the recent ten years, due to the continuous development of process reform and technological innovation, benzene, which has obvious effects on the hematopoietic system and the central nervous system, has gradually been replaced by mixed benzene with low toxicity of benzene, toluene and xylene. The results of the national census in 1981 showed that only 4.9% were exposed to benzene and 95.1% were exposed to benzene mixed with benzene. Therefore, the impact of mixed benzene on workers is gradually being taken seriously. Reported in the literature, long-term exposure to mixed organic solvents can affect the psychological function of workers, the Lord