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合金中钽的测定以分光光度法居多,由于试样成分复杂常辅以各种分离手段,诸如溶剂萃取,沉淀和离子交换色层分离,能直接测定者颇少. 我们已报道以“N-607”季胺盐为活性物质,研制成PVC膜氟钽酸根离子选择电极,在1～5M氢氟酸介质中,钽形成TaF_6~-,在钽浓度10~(-1)～5×10~(-7)范围内,电极呈良好的Nernst响应,选择性、响应时间、稳定性等性能亦是良好的. 本文试图在合金分析中应用此种电极.实验表明大量Ni,Fw,Cr,Ti,Al,几十倍的Mo,W,Zr,几倍的Si,B不干扰钽的测定,可不经分离直接测定铁基、镍基中低至
The determination of tantalum alloy spectrophotometry mostly due to the complexity of the sample often accompanied by a variety of means of separation, such as solvent extraction, precipitation and ion exchange chromatography chromatography can be directly measured quite a few.We have reported that the “N- 607 ”quaternary ammonium salt as the active material, developed a PVC membrane fluorotitanate ion selective electrode, in 1 ~ 5M hydrofluoric acid medium, tantalum TaF_6 ~ -, tantalum concentration of 10 ~ (-1) ~ 5 × 10 ~ (-7), the electrode shows a good Nernst response, and the selectivity, response time, stability and other properties are also good.This paper attempts to apply this kind of electrode in alloy analysis.Experiments show that a large amount of Ni, Fw, Cr, Ti , Al, tens of times of Mo, W, Zr, several times of Si, B does not interfere with the determination of tantalum can be directly determined without separation of iron-based, nickel-based low