ICS-90 Ion Chromatography System
1-2 Doc. 031851-05 12/04
3. Detection
• After the eluent and sample ions leave the column, they flow through
a suppressor that selectively enhances detection of the sample ions
while suppressing the conductivity of the eluent.
• A conductivity cell monitors and measures the electrical conductance
of the sample ions as they emerge from the suppressor and produces a
signal based on a chemical or physical property of the analyte.
4. Data Analysis
• The conductivity cell transmits the signal to a computer running
chromatography software.
• The chromatography software (for the ICS-90, this is Chromeleon®)
analyzes the data by comparing the sample peaks in a chromatogram
to those produced from a standard solution. The software identifies
the ions based on retention time, and quantifies each analyte by
integrating the peak area or peak height. The results are displayed as a
chromatogram, with the concentrations of ionic analytes
automatically determined and tabulated.
Figure 1-1. Ion Analysis Process
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