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钍的分析和富集对于原子能工业、冶金、地质、环保等方面均具有重要的意义。本文研究了用1-苯基-3-甲基-4-苯甲酰基吡唑酮-[5](PMBP)-石油醚萃取、间硝基偶氮氯膦(CPAmN)分光光度法测定独居石中钍的条件、方法及钍与CPAmN的络合比,国内外未见报导。在本实验条件下测得钍与CPAmN络合物的摩尔吸光系数为8.18×10~4升/摩尔·厘米,桑德尔灵敏度为0.00284微克钍/厘米~2。25毫升体积中,钍在0～20微克范围内都服从比尔定律。根据十次平行测定,计算得变异系数为0.73％。测定独居石矿样中的钍,结果与用重量法测得的结果趋于一致,且回收率在97.78～104.7％之间,令人满意。
Thorium analysis and enrichment for the atomic energy industry, metallurgy, geology, environmental protection and other aspects of great significance. In this paper, the extraction of 1-phenyl-3-methyl-4-benzoylpyrazolone- [5] (PMBP) Thorium in the conditions, methods and the complexation ratio of thorium and CPAmN, no reports at home and abroad. The molar absorption coefficient of thorium and CPAmN complex measured in this experiment is 8.18 × 10 ~ 4 L / mol · cm, the Sensitivity of Sandrine is 0.00284 micrograms thorium / cm ~ 2.25 mL volume, Beer’s law is obeyed in the range of 20 micrograms. According to ten parallel determinations, the calculated coefficient of variation was 0.73%. The determination of thorium in monazite ore samples was consistent with the gravimetric results and the recoveries ranged from 97.78% to 104.7%.