作业场所中３，３○二氯联苯胺及其共存的２，５二氯苯胺和联苯胺目前我国尚无统一的监测方法，利用紫外分光光度法测定车间空气中３，３○二氯联苯胺近期已见报道［１］。我们采用高效液相色谱（ＨＰＬＣ）法测定车间空气中３，３○二氯联苯胺，现报道如下。一、材料 3,3 ○  Dichlorobenzidine workplace and its coexistence of 2,5Dichloroaniline and benzidine There is no uniform monitoring method in our country, the use of UV spectrophotometry for the determination of 3,3 ○  2 Clizidine has recently been reported [1]. We use high performance liquid chromatography (HPLC) method for the determination of 3,3 ○  dichloro benzidine in the air, are reported below. First, the material