ジルコニウムおよびジルカロイ中のウランの吸光光度定量

概要

論文の詳細を見る
A method is described for the determination of 110 ppm of uranium in zirconium and Zircaloy. The sample is dissolved in hydrochloric and hydrofluoric acids, and the solution is evaporated to dryness. Uranium is extracted twice with 10% tributyl phosphate in carbon tetrachloride from an acid solution containing EDTA, ascorbic acid, and ammonium thiocyanate. After washing the organic phase, the uranium is back-extracted with 1<I>M</I> hydrochloric acid. The back-extract is evaporated to dryness, and uranium (VI) is reduced to uranium (IV) with zinc in hydrochloric acid solution. Oxalic acid and Arsenazo III are added, and the absorbance of the uranium (IV)-Arsenazo III complex is measured at 665 nm.<BR>Satisfactory results have been obtained in applying the proposed method to several standard samples.
社団法人日本分析化学会の論文