Ed Electrochemical Detector; Electrochemical Detector Cell - Thermo Scientific Dionex ICS-5000 Operator's Manual

•
The eluent/sample mixture is pumped through a temperature stabilizer
(analytical IC only), through the guard and separator columns
then through the suppressor
•
From the suppressor, the mixture flows through a CRD
the cell
Chromeleon software.
•
The mixture flows out of the cell and is recycled back into the
suppressor
chamber. Regenerant flow is routed through the CRD
through the EG degas tubing
14
waste
2.15

ED Electrochemical Detector

One or two Dionex ICS-5000 Electrochemical Detectors (EDs) can be
installed in the DC. Each complete ED assembly consists of an amperometric
detection cell and the detector electronics required to collect data and send it
to the computer and the analog output (if installed). The detector is installed in
the upper compartment of the DC (see
front of the detector. The detector electronics are not accessible to the user.
The ED can perform the following electrochemical detection modes:
•
DC amperometry (see
•
Integrated amperometry—includes pulsed amperometric detection (PAD)
and integrated pulsed amperometric detection (IPAD) (see
•
Cyclic voltammetry (see

2.15.1 Electrochemical Detector Cell

The ED cell includes three different electrodes. It is a miniature flow-through
amperometric detection cell with a titanium cell body (the counter electrode),
a working electrode, and a combination pH-Ag/AgCl reference electrode (see
Figure 2-30) or a PdH reference electrode. The type of working electrode
used depends on the application. Four conventional (non-disposable) working
electrode types are available: gold, platinum, silver, and glassy carbon. Five
disposable working electrode types are available: gold on two different
substrates (polyester or PTFE), silver, platinum, and carbon.
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7
9 , where the analytes are detected. A digital signal is sent to
10 , where it is used as the water source for the regenerant
.
Section
Section
.
12 , through the CR-TC
Figure 2-21). The cell mounts on the
2.19.1)
2.19.3)
2 • DC Description
6 , and
8
(if installed) to
11
(if installed),
13 , and then out to
Section 2.19.2)
75