Storage and maintenance methods of ph meter (acidity meter) electrodes
Storage and maintenance methods of ph meter (acidity meter) electrodes
The electrode of ph meter (pH meter) should be stored in the following ways:
Please store the electrode in 3mol/L potassium chloride solution (3 M KCl) when not in use; It can be stored in pH7.00 buffer for a short time. The service life of ph meter electrode will be shortened if it is left dry or soaked in distilled water for a long time.
Maintenance method of ph meter (pH meter) electrode:
After using the electrode of ph meter for a period of time, if it is found that the slope becomes lower and the response speed becomes slower, the following methods can be tried.
1. If the measured sample contains protein, the electrode membrane can be cleaned with pepsin/hydrochloric acid lotion (ME51340068).
2. If the measured sample is oily/organic liquid, it can be washed with acetone or ethanol.
3. If it is found that the liquid winding part of the electrode of ph meter becomes dirty and black, the liquid winding part can be cleaned with mercaptan cleaning solution (ME51340070).
4. Activate the electrode membrane.
Activation method: soak the electrode regeneration solution (ME51340073) of ph meter for 30 seconds, and then soak it in 3mol/L KCl solution for 5 hours.
Classification of PH meter and acidity meter
1. According to the measurement accuracy, it can be divided into 0.2-level PH meter, 0.1-level PH meter, acidity meter, 0.01-level PH meter, acidity meter or higher precision PH meter, and acidity meter.
2. According to the volume of the instrument, there are pen PH meter, acidity meter (mini PH meter, acidity meter), portable PH meter, acid-base meter and desktop PH meter.
3. There are online PH meters and acidity meters for online continuous monitoring and measurement.
4, according to the requirements of use: pen PH meter, acidity meter (mini PH meter) and portable PH meter, acidity meter is generally brought to the scene by inspectors for testing.
5. Select PH meter, and the accuracy level of acidity meter is measured by users.
