What must be done if the sample pH differs by more than 2 degrees Celsius from the buffers?

When measuring pH, it is essential to maintain the accuracy and reliability of the results, and that includes the relationship between the sample and the calibration buffers. If the sample pH differs by more than 2 degrees Celsius from the buffers, this substantial difference can lead to skewed readings because pH meters are temperature sensitive.

To ensure accurate pH measurements, adjustments must be made to account for this temperature disparity. Correcting the result for the temperature difference allows for an accurate assessment of the sample’s pH, thereby maintaining the integrity of the data collected and ensuring that it conforms to applicable standards and guidelines.

In practical laboratory settings, when pH readings are taken, calibration is typically performed at a specific temperature, usually at or near room temperature. If the sample temperature deviates significantly, recalibrating the meter would not resolve the issue because the pH reading is still contingent on the precise temperature at which the sample is measured, and not recalibrating could lead to further inaccuracies in the results. Discarding the sample is not a practical or necessary step; if the pH is different, adjustments should be made rather than forgoing the sample completely. Generating a report may be necessary after testing, but it does not address the