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用试剂DSPCF测定铌的方法已用于矿石分析。该法具操作简便、选择性高和稳定性好的优点。但应用于微量铌的测定尚感灵敏度稍低(ε=1.40×10~4)。本文按文献所列实例,引入能在酸性溶液中生成复合阳离子的二安替比林甲烷(DAM)作为络合物的第三组分,提出并研究了新的体系的分光光度特征。制定了使用高级醇为萃取溶剂的三元络合物测定微量铌的光度法。本法可借改变有机相和水相比例的办法
The method for determining niobium with reagent DSPCF has been used for ore analysis. The method has the advantages of simple operation, high selectivity and good stability. However, the determination of trace niobium is still slightly lower sensitivity (ε = 1.40 × 10 ~ 4). In this paper, according to the examples listed in the literature, the introduction of diantipyrylmethane (DAM), which can form composite cations in acidic solution, as the third component of the complex, the spectrophotometric characteristics of the new system were proposed and studied. A spectrophotometric method has been developed for the determination of trace niobium using ternary complexes of higher alcohols as the extraction solvent. The law can be changed by the organic phase and water ratio approach