How long can the electrodes of the pH meter be used?
The electrode is the only part in the pH meter that is in direct contact with the sample. Its selection, storage and maintenance have a great impact on the precision and accuracy of the measurement. Therefore, it is necessary for us to have a certain understanding of pH electrodes. Among them, "How long can the pH electrode be used?" This question is often asked by many users, but it cannot be answered in a few words.
Firstly, the national standard (ZBN50003-88) introduces the regulations on electrode "life": "Guarantee period of electrode: from the date of manufacture marked on the electrode, when it is unpacked and used within one year of storage, its performance shall meet the requirements of this standard. All the requirements of the standard. 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. It is very clear here that the quality guarantee period of the electrode is based on the fact that it has not been used. The premise is that the term is one year, so many people generally say that the life of the electrode is one year, which is actually wrong.
In addition to the quality of the electrode itself, there is also a problem of use and maintenance.
The first is to use the medium. The same electrode will be in contact with different media. Some media are very clean, such as tap water, and some media are strong acid and alkali or even high temperature. The second is the use time, some are used occasionally, and some are used continuously for a long time. The third is whether to clean and maintain, so there will be a big difference here. Generally speaking, if an electrode fails within a short period of time, it may be that the electrode model is not selected correctly or the user does not maintain it properly. In this case, the manufacturer is not responsible for the refund. Of course, if the electrode has been used, but its appearance is still good, and there is no trace of bad use, it may be due to the quality of the electrode, and the manufacturer will generally be responsible for the refund. As for some electrodes known as long-life electrodes, there are actually some problems. The general use time of the electrode is half a year to one year, and the time of industrial pH electrodes with poor use conditions may be shorter.
