甲苯主要经呼吸道进入机体,皮肤也是一种不可忽视的途径。空气中接触限值是对作业者环境状况的一种度量;生物暴露限值则是对经呼吸道及其它途径进入机体毒物总量的一种度量。目前,有些国家已颁布了它的生物暴露限值,我国尚无这方面的标准。本调 Toluene mainly through the respiratory tract into the body, the skin is also a way not to be ignored. Exposure limits in air are a measure of the environmental conditions of the operator; bio-exposure limits are a measure of the total amount of poisons that enter the body via the respiratory tract and other sources. At present, some countries have enacted their biological exposure limits, and there is no such standard in our country. This tune