摘要
Purex 流程一循环浓缩废液中的稀土(包括 Y)经萃取法分离纯化后,用新型显色剂三溴偶氮氯膦进行分光光度测定。选择合适的显色条件,可使稀土各元素间绝对灵敏度相近。用于废液中稀上总量的测定,方法简便、实用、灵敏。全程序稀土的回收率为(97.1±1.1)%,稀土总量≥2μg时误差<4%。
The separation of rare earths (inclusive of Yttrium) from liquid waste of the first cycle in purex process with solvent extraction is investigated. The spectrophotometric method is used for their determination. A new reagent, chlorophosphonazo-tribromide, and suitable conditions are chosen. The absolute sensitutivety among the rare earths is similar. The method for determining the total amount of rare earths in liquid waste is simple,applicable and sensitive. Recovery of rare earths in the whole procedure is (97.1±1. 1)%. When the amount of rare earths in the sample is greater than or equal to 2μg the error of the method used is less than 4%.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
1992年第2期41-47,共7页
Atomic Energy Science and Technology
关键词
高放废液
稀土
萃取光度法
Rare earth
Solvent extraction
Spectrophotometry
Chlorophosphonazo-Tribromide