Determination of Diffusion Coefficients by Means of Normal Pulse Voltammetry with a Stationary Disk Electrode.

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  • IKEUCHI Haruko
    Department of Chemistry, Faculty of Science and Technology, Sophia University
  • KAWAI Yukiko
    Department of Chemistry, Faculty of Science and Technology, Sophia University
  • ODA Yoshihisa
    Department of Chemistry, Faculty of Science and Technology, Sophia University
  • SATO Gen P.
    Department of Chemistry, Faculty of Science and Technology, Sophia University

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説明

Normal pulse voltammetry with a stationary unshielded disk electrode can be used for determining the diffusion coefficients of electroactive species in an electrolyte solution if the pulse interval is sufficiently long to eliminate the effects of the preceding pulse. Two experimental examples are presented: (1) hexacyanoferrate(III) ions in 1mol dm-3 KCl solution and (2) thallium(I) ions in 0.5mol dm-3 KNO3 solution. In the former example, the determined diffusion coefficient agreed with the reference value within 1%. In the latter, the agreement was less satisfactory, presumably due to the fact that the reduced form was deposited on the electrode surface.

収録刊行物

  • Analytical Sciences

    Analytical Sciences 7 (3), 389-392, 1991

    社団法人 日本分析化学会

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