分光光度法测定高放废液处理工艺中的U  

Spectrophotometric Determination of Uranium in High-level Liquid Waste and Its Separation Process With Arsenazo Ⅲ

作　　者：郭一飞[1] 梁俊福[1] 焦荣洲[1] 刘秀琴[1] 

机构地区：[1]清华大学核能技术设计研究院,北京102201

出　　处：《原子能科学技术》2000年第3期252-258,共7页Atomic Energy Science and Technology

摘　　要：用偶氮胂Ⅲ分光光度法测定了TRPO流程处理高放废液热实验中水相和有机相的U含量。在pH =1 5的酒石酸存在下 ,水相样品可以直接显色测定 ,有机相样品用偶氮胂Ⅲ溶液反萃其中的U并同时显色测定。本方法与U的激光荧光法、同位素稀释质谱法、ICP AES法进行了比较 ,分析结果符合良好。U的检测限为 0 0 2mg/L ,精密度为 3% ,重加回收率在 97%～ 10The spectrophotometric determination of uranium in high level liquid waste and its separation process with arsenazo Ⅲ are studied. In the presence of tartaric acid (pH=1.5), stripping and determination of uranium are completed. When the presence of rare earth elements and the concentration of uranium is lower than 0.6 mg/L in aqueous solution, uranium must be separated from the solution and then is determined. The detection limit of uranium is 0.02 mg/L, the precision of the method is 3 %, the recovery of added standard sample is 97 %～105 %,respectively.

关 键 词：高放废液 分光光度法 偶氮胂Ⅲ 铀测定 

分 类 号：TL271.4[核科学技术—核燃料循环与材料]