| 摘要 |
PURPOSE:To provide a method and device for restoring a changed electrode potential of a pH measuring electrode using metal oxide or metal for sensitive film to an original potential condition in a short time. CONSTITUTION:Electrode potential-changed pH measuring electrodes 1-4 using iridium oxide for pH-sensitive film are electrically shortcircuitted by electrically connecting their leads 1a-4a to each other, and they are immersed in neutral phosphate solution 5 of pH 6.86 for about an hour. The pH-measuring electrodes of which electrode potential is changed can be restored almost to an original potential condition in a short time to be stabilized, so a very good efficiency is achieved, and because they can be restored to the potential condition where calibration can be performed sufficiently to be stabilized, thereby they can be reused without being wasted and disposed as defectives. |
