对硅钙钡合金中Ca、Ba的连续测定方法的探讨

Discussion on method of silicon calcium and barium alloy continuous measurement

本文对钙、钡的连续测定的方法进行探讨。以硝酸-氢氟酸分解样品,高氯酸冒烟驱除氢氟 酸,用硫酸钡重量法测定钡,PH≥12时,用EDTA络合滴定法测定钙。此方法准确,精密度高。

The continuous measurement method about Calcium and Barium alloy is discussed in this paper. The sample is decomposed by HNO3HF,then HF and HNO3are drove out by smoking HCl04,Barium is determined by barium sulfate gravimetry,calcium is determined by edta complexometric titration in the solution or PH≥12.The Method has a good selectivity and high accuracy.