Clean The Ph Electrode - GE AKTA avant User Manual

7.6.7

Clean the pH electrode

Maintenance interval
Clean the pH electrode when required. The pH electrode can be cleaned either when it
is installed in the pH valve or when it has been removed. The pH electrode has a limited
longevity and should be replaced every six months or when the response time is slow,
see Section 7.5.2 Replace the pH electrode, on page286. After cleaning has been performed,
re-calibrate the pH monitor, see Section 7.7.1 Calibrate the pH monitor, on page 321.
Required material
The following materials are required:
•
•
•
•
•
•
Cleaning agents
Clean the pH electrode using one of the following procedures:
Salt deposits
Dissolve the deposits by immersing the electrode for a five minute period in each of the
following solutions:
•
•
•
Rinse the electrode tip in distilled water between each solution.
ÄKTA avant User Manual 29035184 AE
Syringe, 25-30 ml
Distilled water
0.1 M HCl and 0.1 M NaOH
or
Liquid detergent
or
1% pepsin solution in 0.1 M HCl
or
1 M KNO
3
0.1 M HCl
0.1 M NaOH
0.1 M HCl
7 Maintenance
7.6 Maintenance when required

7.6.7 Clean the pH electrode

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