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利用低浓铀(low enriched uranium,LEU)生产裂变~(99)Mo时会产生杂质核素~(90)Sr和~(103)Ru,为了确定~(99)Mo产品的放射性核素纯度,需测定上述杂质核素的去污系数。在~(99)Mo分离纯化模拟实验中,通常用稳定核素替代放射性核素,Mo产品所含杂质核素Sr、Ru的含量可选用分光光度法测定。本工作基于Sr(Ⅱ)与三溴偶氮胂、Ru(Ⅲ)与硫脲分别在磷酸、盐酸介质中可形成蓝色络合物,研究了络合物吸收光谱,以及酸度、显色剂用量和显色时间对显色体系吸光度的影响,建立了Sr和
In order to determine the radionuclide purity of ~ (99) Mo products, the production of fission ~ (99) Mo with low enriched uranium (LEU) Determine the above-mentioned impurity nuclide decontamination factor. In the ~ (99) Mo separation and purification simulation experiment, stable radionuclides are usually used instead of radionuclides. The content of Sr and Ru in impurity products of Mo products can be determined by spectrophotometry. This work is based on the formation of blue complexes of Sr (Ⅱ) with tribromoarsenazo, Ru (Ⅲ) and thiourea in the presence of phosphoric acid and hydrochloric acid respectively. The absorption spectra of the complexes, as well as the acidity, The amount of color and color development time on the absorbance of the system, the establishment of Sr and