Calibration Buffer Solution pH 4.01 100ml
What is pH:-
pH is the measurement of the concentration of free hydrogen ions in a liquid. The pH of pure water is 7. Liquids having a larger concentration of hydrogen ions than water are acid and have a pH-value of less than 7. Liquids with a lower concentration of hydrogen ions, on the other hand, are base and have a pH value higher than 7. The pH scale runs from 1 to 14.
Maintaining a pH-meter:-
Your pH-meter is a precision instrument. Proper use and appropriate maintenance are important if you are to enjoy it for a long time. Here are some things to look out for:
When you buy it the electrode is usually dried out. Start by letting it soak in the storage solution for 4 hours. Also fill the cap that slides over the electrode with the same storage solution after use. In this way your electrode will keep on working properly for much longer.
To take a measurement the pH meter must first be calibrated. The buffer solution can be used to do this. If the pH meter can only be calibrated at 1 point, use the buffer solution that is closest to your normal readings.
During calibration watch out that no ‘contamination’ of the buffer solution occurs – so never stick the electrode directly into the bottle, but instead pour a small quantity into a separate beaker and take the measurement in that. After calibration, pour the used beaker away and do not return the liquid back into the bottle!
You should preferably never touch the electrode – certainly not with your fingers. If you want to clean the electrode, do so only with a soft cloth without rubbing.
