Determination of Total Germanium in Chinese Herbal Remedies by Square-Wave Catalytic Adsorptive Cathodic Stripping Voltammetry at an Improved Bismuth Film Electrode

Figure 4

The effect of pH of the supporting electrolyte on the stripping peak current (a) and the position of peak (b) of Ge(IV)-pyrogallol complex in 0.1 mol L⁻¹ HAc-NaAcn + pyrogallol (1.3×10⁻³ mol L⁻¹) + 3×10⁻⁴ mol L⁻¹ KBrO₃; Ge(IV) concentration: 10 μg L⁻¹. Other conditions as in Figure 1.