ICS-3000 Ion Chromatography System
68 Doc. 065031-04 1/08
2.16.7 Storing and Reprocessing Amperometry Data
NOTE Chromeleon Xpress cannot store or reprocess
amperometry data.
Chromeleon provides storage of both 2D and 3D pulsed amperometry and
integrated amperometry data. For 2D data, Chromeleon stores the
detector’s response at each waveform period’s integration interval. One
integrated data point per waveform period is stored. This allows you to
produce a chromatogram similar to the example shown in Figure 2-31
.
The retention time (in minutes) is on the x-axis and the detector response
(in nanoCoulombs) is on the y-axis.
For 3D integrated amperometry data, Chromeleon stores raw data points
at a rate of 1 KHz throughout the entire run. Each raw 3D data point is
defined by the following attributes: the detector current (1) recorded at a
particular waveform time (2) and at a specific retention time (3). As a
result, the two-dimensional view of an integrated amperometry
chromatogram (retention time vs. integrated current) is extended by a
third dimension (waveform time). Thus, data for the entire waveform
period—not just the integration intervals—is collected. For details about
Figure 2-31. Example Chromatogram for a Pulsed Amperometry Application
0
1
2
3
4
5
6
Minutes
0510
40
Analytical Column: CarboPac PA10
and Guard
Eluent: 18 mM NaOH
Flow Rate: 1.5 mL/min
Detection: Pulsed Amperometry
Electrode: Gold
Waveform: Quadruple Potential
(4 x 250 mm)
Peaks: 1. L-Fucose
2. D-Galactosamine
3. D-Glucosamine
4. D-Galactose
5. D-Glucose
6. D-Mannose
Retention Time (Minutes)
Response
(nC)
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