摘要
硝酸溶解二氧化铀芯块,采用TBP树脂连续分离Mn、Cr、Ni、Mo、Th五种元素,等离子体发射光谱(ICP-OES)法测定Mn、Cr、Th,石墨炉原子吸收(GAAS)法测定Ni、Mo。结果表明:3mol/L硝酸介质中,U、Th被TBP树脂吸附,Mn、Cr、Ni、Mo 4种元素直接进入接收液(A),继续用6 mol/L盐酸平衡柱子,弃去8mL死体积后,此时Th淋洗进入接收液(B)。接收液为高酸基体,元素浓度低,故将接收液蒸至近干,稀酸溶解测定。采用标准物质(GBW04242)对该方法进行验证,测定值均在标准值的置信区间内。
Uranium dioxide pallets were dissolved in HNO3.Mn,Cr,Th were determined by ICP-OES and Ni,Mo by GAAS after separation by TBP resins.U and Th were adsorbed in 3mol/L HNO3 by TBP resins and Mn,Ni,Mo,Cr were received as solution A.Th was received as solution B after 8mL dead volume.Solution A and B were steamed to nearly dry and then dissolve by dilute acid for measurement.The method is verified through reference material GBW04242.The measured values are in the confidence interval.
出处
《核化学与放射化学》
CAS
CSCD
北大核心
2017年第2期179-182,共4页
Journal of Nuclear and Radiochemistry
关键词
二氧化铀芯块
TBP
分离
高酸基体
uranium dioxide pallets
TBP
separation
high acid matrix