用卡氏库仑法测定二氧化铀中的水分  

Determination of water content in uranium dioxide with Karl Fisher coulometer

作　　者：王春叶[1] 杜桂荣[1] 谢树军[1] 李晓红[1] 朱小良 

机构地区：[1]核工业北京化工冶金研究院,北京101149 [2]西安中核蓝天铀业有限公司,西安710500

出　　处：《铀矿冶》2011年第4期197-199,共3页Uranium Mining and Metallurgy

摘　　要：介绍测定二氧化铀中水分的卡尔费休库仑法及条件参数的优化。采用以下条件参数对二氧化铀中的水分进行测定:空气作载气,载气流速为60mL/min,卡氏炉温度为200℃,滴定池的搅拌速度为600r/min,萃取时间为800s。方法检出限为38μg/g,6次平行测定的相对标准偏差为1.76%,标准加入的回收率为93.6%～99.1%。The method of determining water content in uranium dioxide with Karl Fisher coulometer is introduced,and the instrument conditions were optimized.Air is taken as carrier gas,carrier gas flow rate is 40-60 mL/min,the temperature of Cassette furnace is 200 ℃,stirring rate of titration cell is 300-900 r/min,the extraction time is 800 s.Under the above conditions,water content in uranium dioxide was determined.The detection limit of the method is 38 μg/g,the relative standard deviation is less than 1.76%（n=6）,and standard addition recovery is 93.6%-99.1%.

关 键 词：水分 二氧化铀 卡氏库仑法 

分 类 号：O657.12[理学—分析化学]