What is pH meter electrode protective solution?
A liquid used to protect the electrodes of a pH meter, mainly composed of potassium chloride, preservatives, etc.
Electrode maintenance:
The electrodes used in the laboratory are all composite electrodes, which have the advantages of being easy to use, not affected by oxidizing or reducing substances, and having a fast equilibrium speed. When in use, remove the rubber sleeves from the electrode filling port and the lower end to maintain the hydraulic pressure difference of the potassium chloride solution inside the electrode. Below is a brief introduction to the use and maintenance of electrodes:
1. When the composite electrode is not in use, it can be fully immersed in 3M potassium chloride solution. Do not soak in detergent or other absorbent reagents.
2. Before use, check the bubbles at the front end of the glass electrode. Under normal circumstances, the electrode should be transparent and free of cracks; The bubble should be filled with solution and there should be no bubbles present.
3. When measuring solutions with high concentrations, try to shorten the measurement time as much as possible, clean carefully after use, and prevent the measured liquid from adhering to the electrode and contaminating it.
4. After cleaning the electrode, do not use filter paper to wipe the glass film, but use filter paper to absorb dry to avoid damaging the glass film, preventing cross contamination, and affecting measurement accuracy.
5. During measurement, pay attention to immersing the silver chloride internal reference electrode into the chloride buffer solution inside the bulb to avoid the phenomenon of digital jumping in the display part of the meter. When using, be careful to gently shake the electrode a few times.
6. Electrodes cannot be used for strong acids, strong bases, or other corrosive solutions.
7. It is strictly prohibited to use in dehydrated media such as anhydrous ethanol, potassium dichromate, etc.
