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由于铌、钽性质相似,彼此共存,寻求在水相中光度测定微量铌、钽的高灵敏试剂,历来是分析工作者努力探索研究的课题。近年,沈含熙等提出用水杨基萤光酮—CTMAB体系测定铌钽的新方法,此法灵敏度极高,但测铌时钽干扰测定,测钽时铌的允许倍数仅3倍,难于分析铌钽共存倍比范围较大的试样(如矿石)。在资料基础上,作者研究了用5-Br-PADAP-OP及水杨基萤光酮-CPC体系分别测定铌、钽的分析步骤,可测定铌、钽含量为0.00X～0.1X％且其铌钽共存倍比范围较大的矿样
As niobium and tantalum are similar in nature and coexist with each other, the search for highly sensitive reagents for the photometric determination of niobium and tantalum in the aqueous phase has traditionally been an issue that analysts are trying to explore. In recent years, Shen Han-hsi, etc. proposed salicyl fluorone-CTMAB system for the determination of niobium and tantalum new method, the sensitivity of this method is very high, but the determination of niobium tantalum interference determination of niobium when tantalum allows only three times the multiple, difficult to analyze the coexistence of niobium and tantalum times Larger than the scope of the sample (such as ore). On the basis of the data, the authors studied the analytical procedures for the determination of niobium and tantalum by 5-Br-PADAP-OP and salicylfluorone-CPC respectively. The determination of niobium and tantalum content of 0.00X to 0.1X% and the determination of niobium and tantalum Coexistence of a larger than the ratio of ore samples