Electrochemical Behavior of Malachite Green in Aqueous Solutions of Ionic Surfactants

Figure 8

UV-visible spectra of (a) 2.0×10⁻⁶ M MG in aqueous solution of KCl without pH adjustment; (b) 2.0×10⁻⁶ M MG in aqueous solution of KCl at pH 1.70, and (c) 5.0×10⁻⁴ M MG chemically oxidized by 1.0 M H₂SO₄ + 2.9×10⁻³ M PbO₂ + HClO₄ in aqueous solution of KCl at pH 1.70.