络合物吸附波法测定痕量铜
CATALYTIC POLAOGRAPHIC DETERMINATION OF TRACE COPPER
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摘要: 在盐酸介质中,铜与巯基乙酸、邻菲罗啉的络合物干峰电位—0.53V(vs.SCE)出现一个尖锐的吸附波。最佳条件由0.6N HCl—0.02%巯基乙酸-0.0025%邻菲绕啉-0.0075%硫脲或者由0.6N HCl-0.02%巯基乙酸-0.0025%邻菲绕啉-0.0075%硫脲-0.0025%聚乙烯醇组成。测定极限0.0001μg ml-1。波高与铜的浓度从0.001—0.050μg/10ml或0.03—2.00μg/10ml呈直线关系。大量的K+、Na+、NH4+、5mgFe3+及一定量常见金属离子、阴离子不干扰铜的测定。该法用于天然水工业废水中痕量铜的测定,可获得快速满意的结果。Abstract: The polarographic adsorptive complex Wave of copper with thioglycollic acid and 1,10-phenathroline in HCl solution has been studied. This method is applicable to the rapid determination of trace copper in waste water with satisfactory results.
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