Abstract: A new sodium alizarinsulfonate modified active carbon paste electrode was development for Cu(Ⅱ) determination by means of anodic stripping voltammetry. The effects of some experimental parameters were studied, such as the best ratio of carbon paste, pH of supporting electrolyte, scan rate, preconcentration potential, preconcentration time and so on. The determination of Cu(Ⅱ) in the concentration range of 1×10^-8～3×10^-3 mol/L exhibited four linear responses. The detection limit was estimated to be 5.6×10^-9 mol/L(S/N=3). Many coexisting ions had little or no effect in the analys is procedure. The new electrode offers many advantageous properties such as high stability and analytical sensitivity.

Key words: sodium alizarinsulfonate, modified active carbon paste electrode, Cu(Ⅱ), anodic stripping voltammetry