摘要
研究了对硝基偶氮氯膦与锆(Ⅳ)显色反应的条件。试验结果表明,于0.60～3.0mol/LHCl介质中,在乙醇存在下,锆(Ⅳ)与CPA-PN能形成1:3蓝色配合物,其最大吸收位于680nm处,表观摩尔吸光系数为2.2×10~4,锆浓度在0～35μg/25ml范围内符合比耳定律。
The conditions of color reaction of Zr(Ⅳ)with p-nitro-chlorophospho- nazo(CPA-PN)are investigated.Experimental results show that in the medium of hydrochlorid acid(0.60～3.00mol/L),in the presence of ethanol, a blue complex of Zr(Ⅳ)with CPA-PN(1:3)is formed,the maximum ab- sorption of which is located at 680nm.,and the apparent molar absorption coefficient is 2.2×10~4.The concentrations of Zr in the range of 0～3g/25 ml obey Beer's law.This method can be applied to determine Zr in Al alloy conveniently and rapidly.
关键词
锆
偶氮氯膦
对硝基
显色反应
p-Nitro-chlorophosphonazo
Absorption spectroscopy
Zirconium
