Calibration of pH
The purpose of the standard
operating procedure is to provide guidelines for calibration of pH Meter.
scope of this standard operating procedure includes calibration of pH
3.1 Section In-charge
3.2 Technical Manager
3.3 Q.A. Manager
Calibration of an indicator reference electrode
combination is undertaken by the standardization of the pH meter with different
buffer solutions and measuring the response by a immersing the combination
electrode in different pH buffer solutions.
STANDARD REQUIRED FOR CALIBRATION / VERIFICATION:
4.1.1 Prepare the buffer solutions of pH 4.0, 7.0 and 9.2
respectively using standard buffer capsules
4.1.2 Switch on the instrument and allow it to stabilize for 20
to 30 minutes.
4.1.3 Under the stipulated operating conditions measure the pH
of the different buffer solutions allowing the reading to stabilizes before
reading the pH.
4.1.4 Adjust the pH meter according to the pH observed.