稀土生产硫酸废液含氟量的测定研究  

The Determination of Fluorine in Sulfuric Acid Waste Produced from Rare Earth

作　　者：赵仕林[1] 刘咏[1] 刘兴艳[1] 朱明[1] 

机构地区：[1]四川师范大学化学与生命科学学院,四川成都610066

出　　处：《四川师范大学学报（自然科学版）》2001年第3期289-291,共3页Journal of Sichuan Normal University（Natural Science）

基　　金：四川省教育厅重点基金资助项目

摘　　要：研究了以高氯酸为介质 ,用水蒸气将氟分离出来 ,以碱液吸收 ,然后以氟试剂分光光度法测定稀土硫酸废液中的氟含量的方法 ,讨论了络合物显色体系的最佳条件 .对稀土硫酸废液中氟含量作了实际测定 ,并作了加标回收率实验 .结果表明 ,氟的加标回收率在 94.5 %～ 10 0 .2 %之间 ,变异系数为 0 .96 %～ 2 .43% .This paper is on the application of low pressure ion chromatography to the analysis of fluorine in rare earth sulfuric acid waste. In the HClO 4 dielectric fluorine was separated from rare earth sulfuric acid waste by water vapor and was absorbed in KOH solution. Then, the determination of fluorine was implemented by the (Ac La) 2F 2 spectrophotometric method. The best condition of the color reaction of color reagent Ac La with F was discussed. Several samples were analyzed by this method. The average recoveries of fluorine ranged from 94.5% to 100.2%. The relative standard deviations were in the range of 0.96% to 2.43%.

关 键 词：硫酸废液 氟 含量测定 分光光度法 稀土生产 显色用量 显色酸度 

分 类 号：X832[环境科学与工程—环境工程] X753