【摘要】 报道了将四羟基蒽醌吸附在稻壳基活性炭上,用直接混合法制成碳糊化学修饰电极及其在测定Cu(Ⅱ)中的应用。实验确定了阳极溶出法测定Cu(Ⅱ)的最佳操作条件。支持电解质为0.03 mol/L H2SO4,富集电位在-0.8V,该电极对Cu(Ⅱ)在5.0×10-8~1.0×10-2mol/L范围内分段有良好的线性响应;实际样品分析浓度小于1.0×10-2mol/L的均不需要稀释,高浓度的样品可不设富集时间,从-0.8 V处直接做阳极扫描,低浓度的样品则需设相应的富集时间,富集时间300 s时,检出限为5.0×10-9mol/L,Mg2+、Mn2+、A l3+和Fe3+等十余种共存离子基本不干扰。用本法分析人发中的铜与光谱法对照,结果令人满意。更多还原

【Abstract】 The utility of activated carbon paste electrode with tetrahydroxyanthraquinone for stripping voltammetric determination of Cu（Ⅱ） in 0.03 mol/L H₂SO₄ medium was demonstrated.At the enrichment potential of-0.8 V,a linear response to Cu（Ⅱ） whose concentration range from 5.0×10^-8 mol/L to 1.0×10^-2 mol/L was obtained.The method has good selectivity over a wide variety of inorganic ions.It has been applied to the determination of Cu（Ⅱ） in human hair,the results were agreement with those obtained by atomic（absorption） spectroscopy.更多还原