论文部分内容阅读
使用无水碳酸钠-氧化锌混合熔剂焙烧半熔铜精矿样品,分离大量的基体元素,用沸水浸取半熔物,在乙醇-水溶液中用硝酸银标准溶液电位滴定测定试液中的氯量;利用氯与银发生化学反应生成氯化银沉淀的原理以及电位突跃判断滴定终点。方法操作简单快速,重现性好,适应性强,可准确测定铜精矿中高含量氯(0.10%~5.00%)。
A sample of semi-molten copper concentrate is roasted using an anhydrous sodium carbonate-zinc oxide mixed flux, a large amount of matrix element is separated, the semi-melt is leached with boiling water, and the chlorine in the test solution is potentiometrically titrated with a silver nitrate standard solution in an ethanol-water solution Amount; the use of chlorine and silver chemical reaction silver chloride precipitation principle and the potential jump to determine the end of titration. The method is simple, rapid, reproducible and adaptable. It can accurately determine the high content of chlorine (0.10% -5.00%) in copper concentrate.