Thermo Scientific Dionex ICS-5000 Operator's Manual page 94

Dionex ICS-5000 Operator's Manual
applied to the working electrode must be raised approximately 0.3 V when
switching from the "Ag" reference to the "pH" reference.
In acidic eluents, the reference potential of the pH half-cell is positive with
respect to the Ag/AgCl half-cell, and all applied potentials must be decreased
by 0.059 V per pH unit when switching from the "Ag" reference to the "pH"
reference.
Do not allow the pH-Ag/AgCl reference electrode to dry out. Make sure
that eluent is being pumped continuously through the cell at a low flow
rate (for example, 0.05 mL/min). If the cell will not be used for a short
time (less than 2 days), disconnect the tubing from the inlet and outlet
fittings and install fitting plugs. For longer shutdowns, remove the elec-
trode from the cell and store it in its storage cap filled with saturated
KCl solution. See
Monitoring the ED Cell pH Readout
Monitoring the pH readout of a solution with a known composition lets you
detect any reference potential shift that may occur over time. This allows you
to determine when the
replacing, thus improving the reproducibility of your analyses. For
instructions on how to monitor the pH readout, see
NOTE
Monitor the pH when the pH-Ag/AgCl reference electrode is
used in the Ag mode as well as in the pH mode.
78
Section 6.4 for detailed storage instructions.
pH-Ag/AgCl reference electrode needs regenerating or
Section 4.1.2.
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