How to use a pH meter correctly
I believe that people who have done tests are familiar with this kind of equipment. Yes, pH meters are very common and very basic detection instruments in chemical experiments.
But do people really use it? Of course, I am not referring to just the process of inserting the electrode probe into the solution to be measured and then reading, because this is only one step in the entire use process.
Let’s talk about the power-on first. In fact, after each testing instrument is turned on, it takes a period of time to reach a stable state and ensure the accuracy of the measured data. This period of time takes at least half an hour.
Besides, before calibration, check whether the electrode probe is immersed in the electrode protection solution; secondly, whether the electrode plug is opened; thirdly, whether the liquid in the electrode needs to be replenished; fourthly, whether the circuit connection is in place.
Next, let’s talk about the standard buffer solution. It is recommended that you sample the prepared standard buffer solution sold as a set, and we can use it according to the instruction manual. I'm not advertising, I'm trying to avoid problems in my formulation that could affect the results.
Here I remind everyone that you must be optimistic about the implementation standard of the commercially available standard buffer solution, and then adjust the instrument to the corresponding standard so as not to affect the measured results.
To start the measurement after calibration, we need to remind everyone that the electrode probe must be completely immersed in the measured solution, but the liquid level must be lower than the liquid level in the electrode. Another is to ensure that the temperature of the measured solution is consistent with the temperature required by the electrode, even if it is an instrument with temperature compensation.
After the measurement, be sure to rinse the electrode with purified water in time, dry the purified water with filter paper, plug the electrode glue back, and then immerse the electrode in the electrode protection solution, not in purified water.
In addition to daily use, you should also pay attention to replacing the new electrode in time, because the electrode is a consumable item, and it will also age with use, which will affect the measured results.
Generally, if you do the above, you can basically meet your needs. As for other problems, you can contact the manufacturer to solve them in time.
I hope you can understand some key points in use through this article, and make your work more smoothly!
