锑精矿中铁含量的测定  

Determination of Iron Concentration in Antimony Ore

作　　者：曾萍[1] 张颖 

机构地区：[1]贵州理工学院,贵阳550003 [2]贵州省分析测试研究院,贵阳550002

出　　处：《贵州科学》2015年第1期9-13,共5页Guizhou Science

摘　　要：试料用硫酸、硝酸溶解,用氢溴酸处理除去砷、锑,在氨性介质中沉淀铁与铜分离,沉淀用盐酸溶解,以钨酸钠为指示剂,用三氯化钛将高价铁还原成低价至生成钨蓝,用硫酸铈氧化至蓝色消失,加入硫磷混酸,以二苯胺磺酸钠为指示剂,用硫酸铈标准溶液滴定,借此测定铁含量。对试剂的最佳化用量、共存离子干扰、精密度、加标回收率进行了试验,建立了硫酸铈滴定法测定锑精矿中铁的分析方法。试验证明,该本法测定铁量,方法精密度高,准确度好,结果稳定可靠,完全满足锑精矿中铁量的测定要求。The sample is dissolved by sulfuric acid and nitric acid. Arsenic and antimony are removed by hydrotromic acid,then the precipitation can be separated from copper in ammonia medium. The precipitation is dissolved in hydrochloric acid. Tungstate is used to indicate that ferric iron is reduced into lower state to generate tungsten blue,which is oxidized by ceric sulfate until the blue which is oxidiaed by ceric sulfate until the blue disappears. After adding the mixed acidic thionation,the contents of iron can be measured with ceric sulfate standard solution.

关 键 词：锑矿石 铁 硫酸铈滴定法 

分 类 号：TD861.1[矿业工程—金属矿开采]