ICS-1000 Ion Chromatography System Operator's Manual

2 • Features2.4.6 SuppressorThe suppressor reduces the eluent conductivity and enhances theconductivity of the sample ions, thereby increasing detection sensitivity.Either an Atlas Electrolytic Suppressor, Self-Regenerating Suppressor, orMicroMembrane Suppressor can be used with the ICS-1000.For details about any of the suppressors or for information about selectinga suppressor for your application, refer to the suppressor manuals. Themanuals are on the Dionex Reference Library CD-ROM (P/N 053891),located in the ICS-1000 Ship Kit (P/N 057905).2.4.7 DS6 Heated Conductivity CellThe ICS-1000 flow-through conductivity cell measures the electricalconductance of analyte ions as they pass through the cell. Two passivated316 stainless steel electrodes are permanently sealed into the PEEK cellbody. The cell design provides efficient sweep-out, low volume (1 µL),and low dispersion. Temperature control and compensation help ensuregood peak reproducibility and baseline stability.Temperature ControlTemperature directly affects the conductivity of a solution. For example,laboratory heating and air conditioning systems can cause a regular slowcycling in the baseline. This, in turn, can affect the reproducibility of ananalysis. The higher the conductivity, the more pronounced the effect.In ion analysis, the effect of temperature variation is minimized bysuppressing eluent conductivity. To further reduce the effect oftemperature variation, the ICS-1000 provides temperature control to thecell. A heater inside the cell regulates the temperature. The cell heater canbe set to between 30 °C and 55 °C. The set temperature must be at least7 °C above the ambient temperature. Setting the cell temperature to 0 °Cturns off the cell heater.Temperature CompensationBuilt-in preset temperature compensation of 1.7% per °C helps minimizechanges in the baseline or in peak heights if the operating temperature isdifferent from the temperature at which the cell was calibrated.Doc. 031879-01 3/03 2-27