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取硫酸铀酰水溶液,加入1.5～2倍的亚硒酸水溶液,和必需量的绝对酒精,使其浓度约等于50%。然后加5%的醋酸铵水溶液,至pH=4～5,在几小时后,将析出的沉淀过滤,以绝对酒精洗涤至剩馀的亚硒酸除尽,然后将亚硒酸铀酰溶解在浓盐酸中,利用碘定量法,应用硫代硫酸盐的淀粉,测定其中的亚硒酸。因为,一克分子量的铀结合一克分子量的亚硒酸。
Take uranyl sulfate aqueous solution, add 1.5 to 2 times the aqueous solution of selenious acid, and the necessary amount of absolute alcohol, so that its concentration is equal to about 50%. Then a 5% aqueous solution of ammonium acetate was added until the pH was between 4 and 5, and after a few hours the precipitated precipitate was filtered and washed with absolute alcohol until the remaining selenious acid had been eliminated. Then, uranyl selenide was dissolved in Concentrated hydrochloric acid, the use of iodine quantitative method, the use of thiosulfate starches, determination of which selenious acid. Because one gram of uranium binds one gram of molecular weight selenious acid.