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１引言铅是公路两侧大气监测中重点控制的重金属元素。不同形态铅的毒性差异很大，其中三烷基铅的毒性最大。我国目前尚无大气中烷基铅的监测方法，用分光光度法进行铅形态分析也未见报道。本文报道了４－（２－吡啶偶氮）间苯二酚（ＰＡＲ）显色－分光光度法测定无机铅、二乙
1 Introduction Lead is the heavy metal element that is the key control in the atmospheric monitoring on both sides of the road. Different forms of lead toxicity vary widely, of which the most toxic trialkyl lead. At present, there is no monitoring method for Alkyl Lead in the atmosphere in our country. There is no report about the analysis of lead status by spectrophotometry. In this paper, the determination of inorganic lead and diethyl ether by spectrophotometry with 4- (2-pyridylazo) resorcinol (PAR)