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磷钼铌蓝-罗丹明 B 水相光度法测定铌已有报道,其摩尔吸光系数为1.4×10~51·mol/L·cm。本文研究了在聚乙烯醇存在下,于0.10～0.14mol/L H_2SO_4介质中,铌与硫氰酸盐和结晶紫形成可溶性离子缔合
Niobium has been reported for the determination of niobium with the phosphomolybdenum niobium blue-rhodamine B aqueous phase. Its molar absorption coefficient is 1.4 × 10 ~ 51 · mol / L · cm. In this paper, we studied the formation of soluble ion association between niobium and thiocyanate and crystal violet in the presence of polyvinyl alcohol in 0.10-0.14 mol / L H 2 SO 4 media