Analytical Studies Using the Convection Electrode. XI. Cathodic Stripping Voltammetry of Chloride Ions with the Pushed-out Mercury Drop Convection Electrode

Abstract

Abstract The cathodic stripping voltammetry of chloride ions in a potassium nitrate or a nitric acid solution was studied by using the Pushed-out Mercury Drop Convection Electrode (PMDCE) (J. Suzuki and T. Ozaki, This Bulletin, 37, 230 (1964)). The cathodic stripping peak current, ip, depended upon the rotating rate of the disk, ω (600—1000 r. p. m.); the rate of voltage scan, v(100—300 mV./min.); the pre-electrolysis time, t (∼3 min.), and the bulk concentration of chloride ions, C. It was concluded that the corresponding cathodic peak current, ip can be given by the equation: ip=kvω1⁄2Ct2⁄3 where k is the constant. In a 0.1 m nitric acid solution, it was possible to determine the chloride ions in so dilute a solution as 3×105− m with a good reproducibility.