1
– Introduction
Thermo Scientific
Product Manual for Dionex Anion Chemically Regenerated
Suppressor for ICE
Page 8 of 22
032661-12
Figure 2
Chemical Suppression with the Dionex ACRS-ICE 500
Chemical Suppression with the Dionex ACRS-ICE 500 lowers the conductivity of the eluent by
removing a highly conductive eluent cation (H
+
) and replacing it with a less conductive cation
(TBA
+
). This process is carried out across the cation exchange membranes. Hydronium ions in
the eluent cross the membranes and combine with the hydroxide ions in the regenerant to form
water. At the same time, tetrabutylammonium ions cross the membranes into the eluent stream
replacing the hydronium ions.
Waste
Analyte (A )
in
Eluent
Cation
Exchange
Membrane
Cation
Exchange
Membrane
To
Detector
in
H O
2
Waste
H
+
Cl -
+
H + OH
-
OH -
OH -
OH -
TBA
+
OH -
TBA
+
-
H
+
H
+
TBA
+
TBA
+
H O
2
H O
2
+
H + OH
-
A-
TBA
+
A-
TBA
+
+
Cl-
TBA
+
Cl-
TBA
+
+
A-
TBA
+
Cl-
TBA
+
&
