摘要
用0.1mol/l D_2EHPA-5%TIOA-二甲苯从1.5mol/l硝酸中萃取Pu(IV)和Pu(VI),Pu(Ⅲ)留在水相。用0.1mol/l草酸将Pu(IV)反萃,Pu(VI)留在有机相。将分开的不同价态的钚定量取样、制源后进行α计数测量,便分析出它们在原样中的浓度。当源盘中钚量达1.5μg时,相对标准偏差为±4%。该方法与恒电位库仑法的相对偏差约为2%。
Plutonium (Ⅵ) and plutonium (Ⅳ) in 1.5 mol/l nitric acid are extracted by0.1 mol/l D_2EHPA--5%TIOA-dimethyl benzene, plutonium (Ⅲ) remains in theaqueous phase. Extracted Pu(Ⅳ) can be stripped by 0.1 mol/l oxalic acid whilePu(Ⅵ) is still in the organic phase. After sampling the separated plutonium speciesand making them into sources, alpha counting is carried out and the concentrationof them are calculated. When the amount of plutonium in a source plate is as highas 1.5μg, the relative standard deviation is ±4%. The relative deviation of thismethod from controlled--potential coulometry is about 2%.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
1991年第6期22-28,共7页
Atomic Energy Science and Technology
关键词
钚
价态
溶剂萃取分离
α计数法
Plutonium
Valency state
Solvent extraction separation
Determination
