Ph Electrode Maintenance; After Use Storage; Electrolyte Replacement (For Refillable Electrodes Only) - Fisher Scientific accumet AE150 User Manual

pH Electrode Maintenance

pH electrodes are susceptible to dirt and contamination and may need to be cleaned
regularly, depending on the extent and condition of use.

After Use Storage

After measurements are done, use the following procedure for proper electrode storage:
1. Wash the electrode and reference junction in deionized water.
2. If using a refillable electrode, close the fill hole by returning its rubber sleeve or
stopper cap into position.
3. Store the electrode bulb in solution, preferably pH electrode storage solution.
a. Using pH 4 buffer is also acceptable as a storage medium. Do not store
electrodes in deionized water.
b. The protective rubber cap or container filled with storage solution provides
ideal electrode storage for long periods.

Electrolyte Replacement (for refillable electrodes only)

Refill the reference electrolyte when the pH electrode has been used for an extended period
or if the internal electrolyte dries up. To accomplish this, use the following procedure:
1. Remove the protective rubber cap or sleeve to expose the fill hole of the electrode.
2. Remove the old electrolyte by flushing it out with a flexible syringe or lint-free tissue.
3. Add in fresh electrolyte until it reaches the level of the fill hole. The type of reference
electrolyte depends on the specific electrode being used.
4. Rinse the electrode and reference junction with deionized water and gently tap dry.
Note: If replacing the reference electrolyte fails to restore normal electrode response,
attempt to clean and rejuvenate the electrode.
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accumet AE150 pH Benchtop Meter
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