PROTOCOL N° 1

WATER pH MEASUREMENT

EQUIPMENT AND REAGENTS

• pH meter with electrodes (glass electrode plus reference electrode, or combined glass/reference electrode)
• Buffer solutions: pH=4, pH=7 and pH=10

PROCEDURE

1. Take approximately 30 mL of the water sample and place it in a beaker,
2. After calibration of measuring set-up rinse the electrode(s) with distilled water, gently dry off the excess water with tissue paper and insert in the water sample allowing 1 min for equilibration,
3. Record temperature and pH values.