沉淀分离-络合滴定法测量硫化钠含量

Determination content of Na_2S with the use of precipitation separation-complexmetric titration

介绍了ZnS沉淀分离EDTA络合滴定法测量工业硫化钠中Na2S含量的原理和方法,并对该方法的准确性和重现性进行了论证.实验结果表明:该方法具有良好的重现性,重复实验的相对标准偏差为0.55%;该方法具有较高的准确性,与碘量法(国标)相比结果相差0.11%,一致性达到99.5%.

A method for determination content of NazS in sodium sulfide was described with the use of ZnS -precipitation separation- EDTA -complexmetric titration, and the repeatability and accuracy on the method were discussed. The results were as followed：good repeatability, good accuracy. Therefore, the method made more way of determination content of Na2S.