Precautions:

i) Never touch the membrane of the glass electrode with anything else except soft tissue paper since it is fragile and is easily ruined if scratched or bumped.

ii) The electrode(s) must not be removed from the solution unless the selector switch is at zero.

iii) Never dip the glass electrode within a solution along with a dehydrating action.

iv) To sample analysis built equilibrium among electrodes and sample through stirring sample to ensure homogeneity and measure pH.

v) If used for measuring pH of albuminous substances, the glass electrode must be cleaned with suitable solvents and then the electrode is placed in distilled water for a few hours before it is used to measure the pH of the other solution.

vi) For  common  solutions along with  pH  more  than  11,  glass  electrodes  of  special composition are required to avoid interference due to sodium ion.

vii) The glass electrode might be covered along with a sleeve to save it from jerks.

viii) The standard buffer of pH value as close as possible to the sample pH value must be taken for the calibration of the system. A Commercially available standard buffer of pH values 4, 7 and 9.2 are generally used.