ICS-3000 Ion Chromatography System
322 Doc. 065031-04 1/08
9.24.5 Calibrating the Reference Electrode
When to Calibrate
• Calibrate after installing a new reference electrode.
Items Needed
• A buffer solution with a pH of 7.00
• A second buffer solution with a different pH (typically one that
matches the pH of the eluent used in your application, either pH 10 or
pH 4 in most cases)
Reference Electrode Calibration Procedure
1. Complete the following if you are calibrating an existing electrode:
a. Turn off the cell voltage from the Control panel in Chromeleon or
Chromeleon Xpress.
b. Turn off the pump flow from the Control panel in Chromeleon or
Chromeleon Xpress or press
PUMP FLOW on the front of the
pump.
c. Disconnect the cell (see Section 9.24.1
).
d. Unscrew the reference electrode and remove it from the cell body.
e. Rinse the reference electrode thoroughly in ASTM Type I
(18 megohm-cm) filtered and deionized water to remove any
precipitated salt.
2. With the reference electrode removed from the cell, connect the
electrical cables to the cell and electrode.
3. Click the EC Detector tab in Chromeleon Xpress or on the panel
tabset in Chromeleon.
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