Thermo Fisher Scientific CyberScan pH 10/pH 100 - Manual (Page 54)

50
g) Test with standard calibration buffer solutions.
CAUTION: Proper eyewear and gloves must be worn when preparing these chemicals and
performing this operation.
Finally, test with standard calibration buffer solutions to see if the electrode yields acceptable
results. You may repeat steps ‘c’ to ‘f’ again for better response (maximum 3 times). If the
response does not improve, then the electrode has completed its useful life. Replace with a
new electrode.