作业场所空气中铅的微分电位溶出测定方法的研究

Study of Workplace air-Determination of Lead Differential Potential Stri pping Analysis

用微孔滤膜采集空气中铅 ,然后溶解于稀硝酸中 ,将含有铅离子的溶液用微分电位溶出法测定 ,该方法的最低检测浓度为 0 .2 5 μg/L ,测定范围 0～ 30 0 μg/L ,相关系数r=0 .9992 ,相对标准偏差为 0 .6～ 2 .3% ,回收率为 95 .6～ 10 4.2 % ,平均采样效率为 97.2 %。本方法可较好地应用于作业场所空气中铅的测定。

The papper reported collection of lead in air by mivr omesh Filter film and then dissolving in rare nitric acid. The sample s olutio n for lead were determined by Differential Potential Stripping Analysis. The Low est detected density is 0.25μg/L, the linearity is very good between 0～300μg/ LRelative standard deviation is 0.6～2.3% and the recovery ration 95.6 ～104.2% while, average collect efficiency is 97.25.This method can be used to d etect lead in workplace air effectively.