硝酸银电位滴定法测定高纯二氧化锗中氯

发布时间：2018-07-06 09:36

本文选题：高纯二氧化锗 + 氯　；参考：《冶金分析》2015年05期

【摘要】：我国行业分析标准采用硫氰酸汞分光光度法测定二氧化锗中氯含量,由于硫氰酸汞是一种剧毒试剂,影响工作人员身体健康和污染环境,为此,建立了一种无毒的测定高纯二氧化锗中氯的电位滴定法。实验结果表明:在pH 2~4的乙醇-水的介质中,以硝酸银标准溶液作为滴定剂,二级微商法确定滴定终点,滴定曲线突跃明显,终点准确,基体锗、大量的Na+、NO3-和二氧化锗中微量金属元素不影响氯的测定。方法用于高纯二氧化锗样品中氯的测定,测定结果与行业标准方法(硫氰酸汞分光光度法)相一致,相对标准偏差在0.89%~1.6%之间。
[Abstract]:The mercury thiocyanate spectrophotometry is used to determine the chlorine content in germanium oxide in China. Because mercury thiocyanate is a highly toxic reagent, it affects the health of workers and pollutes the environment. A nontoxic potentiometric titration method for the determination of chlorine in high purity germanium oxide was established. The results showed that the titration end point was determined by using silver nitrate standard solution as titrant, the titration curve was sharp, the end point was accurate, and the base germanium was obtained by using silver nitrate standard solution as titration agent in the ethanol-water medium of pH 2 + 4. The determination of chlorine is not affected by a large amount of trace metal elements in Na _ (no _ 3 -) and GE _ (2) O _ (2). The method has been applied to the determination of chlorine in high purity germanium oxide samples. The results are in agreement with the industry standard method (mercury thiocyanate spectrophotometry). The relative standard deviation is between 0.89% and 1.6%.
【作者单位】：广东省韶关冶炼厂;
【分类号】：TQ134.31;O657.1

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