工业用甲苯 ,二甲苯常含有一定量的苯和其他杂质 ,故一般统称混苯。关于甲苯 ,二甲苯的毒性屡有报道。有文献认为 ,甲苯 ,二甲苯接触者有轻度血红蛋白降低 ,白细胞增多趋势 ,但这大多是由于内含少量苯或其它杂质所致 ,纯甲苯 ,二甲苯尚未见此毒性[1- 3] 。本文对低浓度混苯接触 Industrial toluene, xylene often contains a certain amount of benzene and other impurities, it is generally referred to as mixed benzene. Toxicity on toluene, xylene has repeatedly been reported. There are literature that toluene, xylene contact with mild hemoglobin decreased, leukocytosis trend, but mostly due to a small amount of benzene or other impurities caused by pure toluene, xylene has not yet seen this toxicity [1-3]. In this paper, low concentrations of benzene mixed contact