5-(4-磺基-1-萘偶氮)-8-羟基喹啉分光光度法测定微量镍的研究

Study on the spectrophotometric determination of trace Nickel with 5-[(4-sulfo-1-naphthyl)azo]-Oxine

5-(4-磺基-1-萘偶氨)-8-羟基喹啉(SNAZO)在乳化剂-OP的存在下与镍(Ⅱ)形成稳定的红色配合物,其镍(Ⅱ)与试剂的组成比为1:4。。配合物在520～540nm的范围内有最大吸收,其表观摩尔吸光系数ε=9.05×10~4l·mol^(-1)·cm^(1),Sandell灵敏度S=6.49×10^(-4)μg/cm^2,Ni(Ⅱ)的浓度在0～0.8μg/ml范围内遵守朗伯-比尔定律。经验试,研究了SNAZO与Ni^(2+)的显色反应性能,并建立了测定微量镍的吸光光度新方法。

In this paper in the presence of surfactant OP, the 5-[(4-sulfo-1-naphthyl) azo]-Oxine (SNAZO) reacts with Ni(Ⅱ) to form a red stable complex have been reported. The complex with a ratio of 1: 4. Which has an absorption maximum at the range of 520～540nm. The reeler absoptivity is 9.05 10~4l·mol·cm^(-1). And the sandell sensitivity is 6.49×10^(-4)μg·cm^(-2). Beer's law is obeyeb for Nickel in the range of 0～0.8μg/ml. This is a new spectrophotome tric method for determination of Nickel.