Why must the pH electrode be calibrated regularly?
After the pH electrode is used for a period of time, the asymmetric potential will change greatly, so it must be calibrated regularly.
The number of pH electrode standards depends on the sample, electrode performance and accuracy requirements for measurement. For high-precision measurement (≤±0.03PH), it should be calibrated in time; for general precision measurement (≤±0.1PH), it can be used continuously for two weeks or even longer after one calibration. As long as the measurement shows that the pH is correct there is absolutely no need for frequent electrode calibration.
When unpacked and used within the validity period, its performance meets all the requirements of this standard. During the guarantee period, if the electrode is found not to work normally due to the manufacturer's reasons, the manufacturer shall be responsible for repairing or returning it. Therefore, the quality guarantee period of the electrode is based on the premise that it has not been used, and the period is one year. Generally speaking, the service life of the electrode is one year, which is not correct.
The service life of the electrode has a lot to do with the medium, and the service life of different media is completely different. In many severe cases, it may only be used for 2 months. And some better media are used for about one year or even longer. Therefore, we recommend that users try to purchase electrodes produced by the nearest manufacturer at the latest time! The shorter the storage time, the better the use effect!
How long is the service life of the pH electrode?
Regarding the life of the electrode, the national standard (ZBN50003-88) stipulates that "the guarantee period of the electrode: from the date of manufacture on the electrode, when it is unpacked and used within one year of validity, its performance meets all the requirements of this standard. Requirements. During the guarantee period, if the electrode is found to be unable to work normally due to the manufacturer’s reasons, the manufacturer shall be responsible for repairing or returning it.” Therefore, the quality assurance period of the electrode is based on the premise that it has not been used, and the period is one year. Generally speaking, the service life of electrodes is one year, which is not correct. The service life of the electrode has a lot to do with the medium, and the service life of different media is completely different. In many severe cases, it may only be used for 2 months. And some better media are used for about one year or even longer. Therefore, we recommend that users try to buy electrodes produced by the nearest manufacturers in the latest time! The shorter the storage time, the better the use effect!
