How To Standardize A pH Meter

The standardization of a pH meter is important to ensure that the readings returned from that meter are accurate. Digital & analog pH meters offer calibration buttons or dials that are used to adjust the sensitivity of the meter. Over the course of standard usage, laboratory equipment, such as a pH meter, loses accuracy and requires standardization. Standardization should be performed regularly.

Step 1

Place the reading end of the pH meter into a standardized solution.

Step 2

Compare the reading on the meter with the known pH of the solution.

Step 3

Use the calibration buttons to change the reading on the meter until it matches that of the standardized solution.

Step 4

Rinse the reading end of the pH meter generously with the ionized water and dry with paper towels.

Step 5

Repeat this process with several standardized solutions to ensure the accuracy of the pH meter.