论文部分内容阅读
文献提出了钡从其EDTA络合物中被选择性地取代出来的间接络合滴定法。但它需引入剧毒的KCN以消除干扰,笔者弃去文献拟定的消除干扰元素的分析手续,而在重晶石样品的处理部分中,采用加入三乙醇胺和氨水的方法,把干扰元素在测定钡之前分离掉,再应用文献提出的分析原理,并选择了方法所需的最佳条件,初步探讨了该法中硫酸钡沉淀溶失的原因及抑制办法,解决了滴定终点返回,结果不稳定的问题,拟定了锶铅存在下硫酸钡的分析方法,应用到生产中,较他法简便,劳动强度小,并能得到满意的结果。
The literature proposes an indirect complexometric titration of barium selectively substituted from its EDTA complex. However, it needs to introduce highly toxic KCN to eliminate the interference. The author discards the analysis procedures for eliminating interfering elements proposed in the literature. In the processing part of the barite sample, the method of adding triethanolamine and ammonia is adopted, Barium before separation, and then applied the analysis of the principle proposed in the literature, and selected the best conditions required for the method of preliminary discussion of the law of dissolution of barium sulfate precipitated causes and suppression methods to solve the end of the titration back, the result is unstable Of the problem, the development of strontium lead in the presence of barium sulfate analysis method, applied to the production, more convenient than his method, labor-intensive, and can be satisfied with the results.