What are the best practices for using laboratory electrodes?
Calibration and measurement
For quick and accurate results, the electrolyte plug should be open during measurements (Note: polymer electrolytes do not have an electrolyte plug).
The electrode should be immersed far enough to cover the diaphragm. The height to which the electrolyte is filled must always be above that of the sample. This prevents the sample solution from entering into the electrode.
Always wait for the electrode to reach the same temperature as the sample.
Between measurements, the electrode should be rinsed with deionized water. If necessary, dab it dry with a paper towel. Never rub the electrode dry with a paper towel, as it will become electrostatically charged an slow response will result.
To prevent problems, calibrate with Duracal buffer. If you do not use Duracal buffer, never calibrate in the original bottle. Always use fresh buffer solution for calibration. Close the bottle after use.
Dispose of used buffer responsibly.
Read the operating instructions of the pH measurement device.