Abstract:
In borax-HCL buffer solution of pH8, Cu
2+、Zn
2+ and Ni
2+formed complexes respectively with 5-Br-PADAP. The solubilities of complexes were increased by OP.Derivative ratio Spectrum-Zero crossing method was used for the simultaneous determination of copper, zinc and nikel. The relative standard deviation was less than 5% for synthetic samples (n=6). The recoveries of copper, zinc and nikel are in the range of 97.0%~103.2%, 96.3%~104.8% and 95.2%~101.9% respectively. This method has been applied to the simultaneous determination of copper, zinc and nikel in aluminum alloy with satisfactory results.