本文提出使硒成为硒酸铅沉淀,再用EDTA容量法滴定沉淀中的铅以间接测定硒的方法。硒酸铅的沉淀作用最好在pH值为2—3及含30％体积乙醇的水溶液中进行,所得沉淀溶于过量EDTA溶液内,用亚锰盐回滴法测定所含的铅可得精确结果。少量的碲及铜、铁等元素不妨碍测定。 This paper proposed selenium as lead selenide precipitation, and then titration by EDTA volumetric method for the determination of lead in the indirect method of determination of selenium. Precipitation of lead selenate is best performed at pH 2-3 and in an aqueous solution containing 30% ethanol by volume. The resulting precipitate is dissolved in an excess of EDTA solution and the lead contained in the solution is determined accurately by the manganous back drop method result. A small amount of tellurium and copper, iron and other elements do not prevent the determination.