Once the meter has been calibrated, it can be used to measure the pH of analyte solutions. The analyte solution should be homogeneous before measuring the pH (gently stir the solution before attempting to measure the pH). Stirring the solution during the measurement may be necessary, but stable pH readings may not be observed while stirring. If the solution must be stirred while measuring the pH, record all stable digits and the range of variation in the unstable digits.
Rinse the electrode with distilled water, then rinse with a small portion of the analyte solution before placing the electrode in the analyte solution. Allow the meter display to stabilize and record the pH.
Measuring the pH of an Analyte Solution
Calibrate the electrode.
Rinse the electrode with distilled water.
Rinse the electrode with a small portion of the analyte solution.
Place the electrode in the analyte solution.
Wait a moment for the meter to stabilize, then record the pH from the meter's display.
Remove the electrode and rinse it with distilled water.
