比光谱导数-零交点法同时测定铜、锌、镍

Simultaneous Determination of Copper, Zincand Nikel by the Derivative Ratio Spectrum-Zero Crossing Method

中文关键词:  比光谱导数  零交点  铜  锌  镍

英文关键词:derivative ratio spectrum  zero crossing  copper  zinc  nikel

中文摘要:

      在pH=8的硼砂-HCl缓冲溶液中,以乳化剂OP作增溶剂,Cu²⁺、Zn²⁺、Ni²⁺分别与5-Br-PADAP形成稳定的配合物.用比光谱导数-零交点法同时测定铜、锌、镍.合成试样6次测定的相对标准偏差小于5%,铜、锌、镍的回收率分别为97.0%～103.2%、96.3%～104.8%和95.2%～101.9%.该方法应用于铝合金中铜、锌、镍的测定,结果满意.

英文摘要:

      In borax-HCL buffer solution of pH8, Cu²⁺、Zn²⁺ and Ni²⁺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.