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本文研究了新显色剂6,8-二磺酸萘偶氮氯磺酚与Nb(Ⅴ)的显色反应和测定条件。在酸度为0.6～3mol/L盐酸时。络合物的组成比为Nb(Ⅴ):R=1:3,摩尔吸光系数为4.42×10~4L·mol·L~(-1)·cm~(-1)。可不经分离直接测定钢铁试样中的铌。
In this paper, the new chromogenic reagent 6,8-disulfonic acid naphthalene azo chlorosulfonates with Nb (Ⅴ) color reaction and determination of conditions. In the acidity of 0.6 ~ 3mol / L hydrochloric acid. The composition ratio of the complex is Nb (Ⅴ): R = 1: 3, the molar absorption coefficient is 4.42 × 10-4L · mol·L -1 · cm -1. Direct determination of niobium in steel samples without isolation.