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作者应用微分电位溶出法（简称ＤＰＳＡ法）对空气中铅进行了测定，其曲线线性范围在ｏ．０～２．５μｇ／２０ｍｌ检测效果最佳，ｒ为０．９９９５。此方法检测限为０．０５μｇ／２０ｍｌ，变异系数为０．５％～１．４％．批内精密度为４．５％，试验平均回收率为９８％～１００％。利用ＤＰＳＡ法和ＭＭ踪比色法对某汽车厂铅作业场所空气铅进行分析，两法测定空气铅的值无差异（Ｐ＞０．０５）。故认为ＤＰＳＡ法不但可以代替双硫腙比色法，而且具有简便快速、灵敏、易于推广等优点。
The authors applied the differential potential stripping method (referred to as DPSA method) for the determination of lead in the air, the curve linear range of o. 0 ~ 2.5μg / 20ml the best detection effect, r is 0.9995. The detection limit of this method is 0.05μg / 20ml, the coefficient of variation is 0.5% ~ 1.4%. The intra-assay precision was 4.5% and the average recovery rate was 98% -100%. Using the DPSA method and the MM-trace colorimetric method to analyze the air lead in the lead workplace of a car factory, there was no difference (P> 0.05) between the two methods in determining the lead content in the air. Therefore, DPSA method not only can replace the dithizone colorimetric method, but also has the advantages of simple, rapid, sensitive, easy to promote.