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pH Measurements
1. Calibrate the electrode as described in the Electrode Calibration
section.
2. Rinse the electrode with distilled water and then with the sample.
3. Place the electrode into the sample.
4. When the reading is stable, record the pH and temperature of the
sample.
Electrode Storage
To ensure a quick response and free flowing junction, the sensing bulb
and reference junction must not dry out.
Short Term Storage (up to one week)
Soak the electrode in ROSS pH electrode storage solution, Cat. No.
810001, or standard pH electrode storage solution, Cat. No. 910001.
For enhanced electrode performance, use ROSS pH electrode storage
solution.
To minimize the chance of breakage, the 8220BNWP ROSS micro pH
electrode should be attached to an electrode stand and suspended in
a beaker that contains storage solution. The electrode should not touch
the side or bottom of the beaker.
Long Term Storage (more than one week)
For refillable pH electrodes, fill the reference chamber and securely
cover the fill hole. Cover the sensing bulb and reference junction with
the protective cap, sleeve or storage bottle containing a few drops of
storage solution. Before returning the electrode to use, prepare it as a
new electrode.
Electrode Maintenance
1. Inspect the electrode for scratches, cracks, salt crystal
buildup or membrane/junction deposits.
2. Rinse off any salt buildup with distilled water. Remove any
membrane/junction deposits as directed in the General Cleaning
section.
3. If a refillable electrode is used, drain the reference chamber, flush
it with fresh ROSS fill solution and refill the chamber with fresh
ROSS fill solution.
Electrode Cleaning Procedures
General Cleaning
We offer a variety of Orion pH cleaning solutions for your convenience,
including solutions for general cleaning, protein removal, bacteria
removal, and oil and grease removal. See the list of Orion cleaning
solutions below the General Cleaning section of this manual. If you
would like to prepare your own cleaning solutions, the general cleaning
procedures contain several recommendations.
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ROSS Ultra, ROSS Ultra Triode and ROSS pH Electrodes
Thermo Scientific Orion
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