为了测定矿石中>0.002%的铀,В.Ф.卢克亚诺夫及其同事推荐了一个不需要的分离伴随元素的偶氮肿Ⅲ方法。方法的实质是将平行的两份比色用的整分溶液,一份使其中的铀还原,一份不还原。两份溶液中的铁都用抗坏血酸还原。在还原铀后,加入草酸消除锆的影响。铀的还原是在10毫升的4N HCl 溶 For the determination of> 0.002% uranium in ores, В.Ф. Lujanov and his colleagues recommend an azo-nephrolithromycin III, an unwanted adjuvant element. The essence of the method is that the two solutions of the two colorimetric whole solutions are used in parallel, one of them to reduce the uranium therein and one of them is not to be reduced. Iron in both solutions was reduced with ascorbic acid. After uranium reduction, the addition of oxalic acid eliminates the effect of zirconium. The reduction of uranium is dissolved in 10 ml of 4N HCl