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本文提出用表面活性剂来增进对硝基苯基荧光酮在水中的溶解度。从而得到了该试剂与钼、铌、钽等高价金属离子的吸收光谱,着重研究了钽-对硝基苯基荧光酮-酒石酸-TritonX-100在0.36～0.78N的盐酸体系,得到钽的摩尔吸光系数为1.65×10~5,比耳定律适用范围为0～10μgTa 25ml~(-1),平行操作十次,其变动系数为3.4×10~(-3)。用草酸-过氧化氢作联合掩蔽剂时,可以掩蔽相当量的铌和钛。应用于测定高温镍基合金中钽,结果是满恶的。
This paper proposes the use of surfactants to improve the solubility of p-nitrophenylfluorone in water. The absorption spectra of the reagent with molybdenum, niobium, tantalum and other high-valent metal ions were obtained. The effects of tantalum-p-nitrophenylfluorone-tartaric acid-TritonX-100 on a 0.36-0.78N hydrochloric acid system were investigated. The absorption coefficient is 1.65 × 10 ~ 5, Beer’s law is applicable to 0 ~ 10μgTa 25ml ~ (-1), parallel operation ten times, the coefficient of variation is 3.4 × 10 ~ (-3). With oxalic acid-hydrogen peroxide as a masking agent, considerable amounts of niobium and titanium can be masked. Used in the determination of high-temperature nickel-based alloy tantalum, the result is full of evil.