三氧化铀中微量氟、氯、溴的测定  

Determination of Trace Amounts of Fluoride,Chloride,Bromide Ions in Uranium Trioxide

作　　者：张耀玲[1] 牛俐珺[1] 许君政[1] 杨掌众 汪南杰 吴王锁[1] 

机构地区：[1]兰州大学放射化学与核环境研究所,兰州730000 [2]兰州核燃料厂,兰州732850

出　　处：《核化学与放射化学》2007年第4期220-225,共6页Journal of Nuclear and Radiochemistry

基　　金：国家自然科学人才培养基金资助项目(J0630962)

摘　　要：为了准确测定三氧化铀中氟、氯、溴的含量,建立了用高温水解法处理样品、离子选择电极法同时测定三氧化铀中F^-,Cl^-,Br^-的方法。对影响高温水解反应的因素:水解温度、水解时间、水浴温度、空气流量、馏分体积等进行了条件实验。结果表明,用本法分析三氧化铀中的F^-,Cl^-,Br^-的相对标准偏差均优于10%,F^-,Cl^-,Br^-的重加回收率分别为85%～100%,90%～100%,45%～55%。In order to determine trace amounts of fluoride, chloride, and bromide in uranium trioxide accurately, a determination method by using ion-selective electrode combined with pretreating the samples with combustion-hydrolysis was established. The influence factors on combustion-hydrolysis, such as temperature and time of hydrolysis, water bath temperature, flow rate of air, volume of distilled water were studied. As a result, all of the relative standard deviations are lower than 10%. The recovery of F^-, Cl^-, Br^- is 85%-100%, 90%-100%, 45%-55%, respectively.

关 键 词：测定 三氧化铀 高温水解反应 离子选择性电极 氟 氯 溴 

分 类 号：O614.62[理学—无机化学]