Determination of pH

Equipment : pH 
meter

Reagent: Standard
pH buffer solutions (pH 4.0 , 7.0 , 9.2)

Procedure: Standardise
the pH meter with standard pH buffer solutions of pH closer to the expected pH
value of the sample at 25⁰C± 2⁰C.

Immerse the electrode in the solution being examined
maintained at 25⁰C± 2⁰C. 
Shake the contents foe about one minute and note the constant reading.