O_3是刺激性气体,是重要的大气污染物之一。当大气中O_3达到一定浓度时,可产生异嗅,使大气的感官性状恶化;嗅觉阈测定是比较特异、灵敏的方法,是制定大气卫生标准必须进行的工作。 选择18名无鼻炎、感冒等上呼吸道感染疾病,不吸烟的健康男性青年作为唤阈测定的评定者。在 O_3 is irritating gas, which is one of the important air pollutants. When O_3 in the atmosphere reaches a certain concentration, it can produce abnormal olfactory and make the sensory traits of the atmosphere worse. The determination of the olfactory threshold is a more specific and sensitive method, which is the work that must be done to formulate atmospheric health standards. A total of 18 healthy male youth without rhinitis, cold and other upper respiratory tract infection and no smoking were selected as assessors of the threshold measurement. in