What is the use of the glass electrode of the pH meter?
1. During the measurement, the bulb of the glass electrode of the online pH meter should be completely immersed in the solution, so that it is slightly higher than the ceramic core end of the calomel electrode.
2. When measuring, use a magnetic stirrer to stir at a suitable speed. The stirring speed should not be too fast, otherwise air bubbles will be generated and attached to the electrodes, resulting in unstable readings.
3. When measuring oily samples, especially those with slick oil, clean them with CCI4 or acetone after use;
Afterwards, it needs to be rinsed with 1.2mol/L hydrochloric acid, then rinsed with distilled water, soaked in distilled water to balance for a day and night before use.
4. After measuring the turbid liquid, rinse it with distilled water in time.
5. After measuring the emulsified solution, clean the electrode with detergent and distilled water in time, and then soak it in distilled water.
6. There should be no air bubbles between the inner electrode of the glass electrode of the online pH meter and the bulb. If there are air bubbles, shake them lightly to let the air bubbles escape.
7. The electrodes of the new online pH meter should be adjusted and soaked in distilled water for a period of time to form a good hydration layer;
The immersion time is related to the composition of the glass and the thickness of the film. Generally, the immersion time for newly made electrodes and electrodes with low glass conductivity and thicker film is 24 hours; otherwise, the immersion time can be shorter.
Due to the improvement of glass quality and manufacturing process, the online pH meter electrodes that are used for the first time or not used for a long time are indicated in the manual;
When using, just soak in 3N KCL solution or deionized water for 2-10 hours.
8. After the determination of a certain solution is completed, rinse carefully, blot the water drops, and then measure the next sample.
