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萃取光度法测定高放废液中稀土总量 被引量:1

DETERMINATION OF RARE EARTHS IN HIGH LEVEL RADIOACTIVE LIQUID WASTE WITH SPECTROPHOTOMETRIC-SOLVENT EXTRACTION
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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
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参考文献5

  • 1杨留成,1988年
  • 2陈佩贤,1986年
  • 3吴斌才,分析化学,1985年,11期,819页
  • 4黎心懿,痕量分析.1,1985年
  • 5张丕禄

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