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E • Introduction to Ion Chromatography (IC)
The Dionex Easion performs isocratic ion analyses using suppressed conductivity
detection. An ion chromatography system such as the Dionex Easion typically
consists of a liquid eluent, a high-pressure pump, a sample injector, a separator
column, a chemical suppressor, and a conductivity cell. Before running a sample,
the system is calibrated using a standard solution. By comparing the data obtained
from a sample to that obtained from the standard, sample ions can be identified
and quantitated. A PC running chromatography software converts each peak in a
chromatogram to a sample concentration and produces a tabulated printout of the
results.
The IC analysis consists of four stages (see
Eluent
1. Eluent Delivery
Pump
1. Eluent Delivery
•
Eluent, a liquid that helps to separate the sample ions, carries the sample
through the ion chromatography system. The Dionex Easion is an
isocratic delivery system. This means that the eluent composition and
concentration remain constant throughout the run.
Doc. 155028-01 08/20
2. Separation
Injection Valve
Sample
5
4
3
6
1
2
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Figure E-1. Ion Analysis Process
Figure
E-1).
3. Detection
Suppressor
Cell
4. Data Analysis
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103
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