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本文提供了不经分离直接测定各种含铀溶液中微量钼的方法。方法基于用丙三醇、抗坏血酸和EDTA作掩蔽剂,在0.39N硫酸介质和溴代十六烷基三甲基铵(CTAB)存在下,Mo(Ⅵ)与苯芴酮生成红色络合物,用胶束增溶分光光度法直接测定。 本方法灵敏度高、简便、快速。测定钼的适用范围为0.10～80毫克/升。试样的相对标准偏差(测定次数n=6)优于±5％,钼回收率94～102％。当钨含量小于钼含量的二分之一时,对钼的直接测定无明显影响。本法也可应用于含铁或钍的溶液中直接测定微量钼。
This article provides a direct determination of trace amounts of molybdenum in uranium-containing solutions without isolation. Methods Based on the use of glycerol, ascorbic acid and EDTA as masking agents, a red complex was formed between Mo (Ⅵ) and benzofluorenone in the presence of 0.39N sulfuric acid and cetyltrimethylammonium bromide (CTAB) Micellar solubilization spectrophotometry direct determination. The method of high sensitivity, simple and fast. Determination of the scope of molybdenum 0.10 ~ 80 mg / l. The relative standard deviation (n = 6) of the sample is better than ± 5% and the recovery of molybdenum is 94 ~ 102%. When the tungsten content is less than one half of the molybdenum content, the direct determination of molybdenum has no significant effect. This method can also be applied to the determination of trace molybdenum directly in solutions containing iron or thorium.