pH electrodes will NOT give accurate pH values in distilled or deionized water because distilled and deionized water do not have enough ions present for......
If a pH probe is not holding a calibration immediately after the calibration process is performed with freshly prepared, accurate standards, then there may be......
Generally, rinsing the electrode with distilled water after using should suffice. If the glass bulb looks dirty, you can rinse the electrode with warm water......