What practical steps should be performed when calibrating a pH meter?
When carrying out the calibration the following points should all be borne in mind • Electrodes should never be allowed to run dry because this will create static charges on the glass membrane resulting in a very sluggish response. • Cleaning of the electrode between buffers and sample or from sample to sample should be carried out by a jet of water from a wash bottle, followed by careful rinsing with the buffer or sample to be measured. For very accurate work it is recommended to repeat the zero calibration after slope adjustment.
