络合滴定法连续测定铅钙合金中铅钙的研究

CONSECUTIVE DETERMINATION OF LEAD AND CALCIUM IN Pb-Ca ALLOY WITH COMPLEXOMETRIC TITRATION

研究了用乙二胺四乙酸二钠络合滴定法连续测定铅钙合金中的铅、钙．样品不须分离，通过选择不同的ｐＨ值，实现二元素的连续测定．方法简便、准确、快捷，加料回收率铅为９６％～１０２％，钙为９５％～１０３％，相对标准偏差铅为０．５２％，钙为１．０３％．

Consecutive determination of lead and calcium in Pb-Ca alloy with EDTA (ethylene diamine tetra-acetic acid) complexometric titration has been studied in this paper.It can be done at various pH without separating samples. Results show that the method is The relative standard deviation (RSD) for Pb and Ca is 0.52% and 1.03% respectively.