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本文叙述了一个阴离子交换分离控制电位库仑法测定动力堆乏元件溶解液中钚的方法。钚经过盐酸羟胺、亚硝酸钠调价后全部转化为钚(Ⅳ),钚(Ⅳ)在7.5NHNO_3介质中吸附在711型阴离子交换树脂床上。用7.5NHNO_3洗涤铀、裂变产物和其它杂质元素后,用0.5NHNO_3-0.02MNH_2OH·HCI淋洗钚于库仑池中。以1NHNO_3为支持电解质、金丝网作工作电极进行库仑滴定。测定范围1—4mg钚,方法精确度好于0.5％。
This article describes an anion exchange control potential coulometric method for the determination of plutonium in a plutonium-depleted element solution. Plutonium was converted to plutonium (Ⅳ) after the price adjustment of hydroxylamine hydrochloride and sodium nitrite, plutonium (Ⅳ) was adsorbed on the 711 anion exchange resin bed in 7.5NHNO_3 medium. After washing the uranium, fission products and other impurity elements with 7.5 NHNO 3, plutonium was rinsed with 0.5 NHNO 3-0.02 MNH 2 OH · HCl in a Coulomb pool. With 1NHNO_3 as supporting electrolyte, gold mesh as working electrode for Coulometric titration. Measuring range 1-4mg plutonium, method accuracy better than 0.5%.