The Solution Temperature Effect:

When there is an increase or decrease in the temperature of a solution, the pH of the solution can CHANGE. This change is not an error caused by the variation in temperature; it is the true pH of the solution at the new temperature. Since this is not an error, there is no need to correct or compensate for the solution temperature effect.

The pH Electrode Temperature Effect:

There is only one MAJOR temperature effect in pH measurement that can cause errors in readings. This is the change in the electrode’s response (or sensitivity) to pH which results from changes in the samples temperature. It is the only REASONABLY predictable error due to changes in temperature, and is the only temperature related factor that pH instruments with temperature compensation can correct for. This temperature error is very CLOSE to 0.003 pH/°C/pH unit away from pH 7. If a sample is measured without using an automatic temperature probe, the solutions temperature needs to be entered into the meter manually to allow it to account for this error.

The Solution Temperature Effect:

When there is an increase or decrease in the temperature of a solution, the pH of the solution can change. This change is not an error caused by the variation in temperature; it is the true pH of the solution at the new temperature. Since this is not an error, there is no need to correct or compensate for the solution temperature effect.

The pH Electrode Temperature Effect:

There is only one major temperature effect in pH measurement that can cause errors in readings. This is the change in the electrode’s response (or sensitivity) to pH which results from changes in the samples temperature. It is the only reasonably predictable error due to changes in temperature, and is the only temperature related factor that pH instruments with temperature compensation can correct for. This temperature error is very close to 0.003 pH/°C/pH unit away from pH 7. If a sample is measured without using an automatic temperature probe, the solutions temperature needs to be entered into the meter manually to allow it to account for this error.