T-940树脂分离富集-极谱法测定二氧化铀中痕量铋  

POLAROGRAPHIC DETERMINATION OF TRACE BISMUTH IN UO_2 BY PRECONCENTRATION AND SEPARATION WITH T-940 RESIN

作　　者：郭锦勇[1] 宋玉珍[1] 刘峙嵘[1] 

机构地区：[1]核工业北京化工冶金研究院,北京101149

出　　处：《铀矿冶》1998年第1期59-62,共4页Uranium Mining and Metallurgy

基　　金：国家自然科学基金

摘　　要：本文采用新型T－940阴离子交换树脂进行了铋与铀及其它重金属离子的分离研究。建立了在NaOH-甘露醇-PAR体系催化极谱测定痕量铋的方法。铋的峰电位为-0.68V（相对饱和甘汞电极）。该方法灵敏度高，铋浓度在0.005～0.1μg／mL.范围内呈现良好的线性关系。用于核纯二氧化铀中痕量铋的测定，效果很好。Separation and preconcentration of trace bismuth in UO2 with T-940 anion exchange resin and polarographic determination method have been studied.A method for catalytic polarographic determination of trace bismuth in the system of sodium hydroxide-mannitol-PAR was presented. The peak valume of the potential of bismuth appeared at-0. 68 V (vs. SCE) and there was excellent linear relationship between the peak height and concentration in the range of 0. 005～0. 1 μg/mL.Trace bismuth in nuclear-pure UO2 were determined by this method with good results.

关 键 词：铀 铋 极谱法 阴离子交换树脂 树脂分离富集 

分 类 号：O614.62[理学—无机化学] O614.532[理学—化学]