| 摘要 |
PURPOSE:To compensate deterioration of the catalytic action of a controlled potential electrolysis cell, by correcting a current value flowing between a working electrode and an opposite electrode in accordance with measured values of working electrode resistance, electrolyte resistance, and interface impedance between the working electrode and the electrolyte, etc. CONSTITUTION:Each resistance of the working electrode 40 and the electrolyte 2 of a controlled potential electrolysis cell 1, and impedance due to electrostatic capacity formed by the working electrode 40 and electrolyte 2 are periodically measured. These measured values are compared with the corresponding initial values stored in calculator at the time of drive of controlled potential, and the drive voltage between the electrode 40 and a reference electrode 42 is controlled. As a result, a current flowing between the electrodes 40, 41 through the cell is made proportional to gas concn. by this control, therefore, the aging deterioration of the controlled potential electrolysis cell is securely corrected and gas concn. is exactly measured unaffected by deterioration with age. |
