CASTING INNOVATIONS
and extended quartz tube lifetimes. The combusted gas stream exiting the furnace area is directed through a drying reagent to remove any moisture that may have been produced or released during com- bustion. Pressure and flow regulat- ing components ensure consistent
combustion, transport and detection from one analysis to the next. The purified gas stream is
The Bruker G4 ICARUS CS HF carbon and sulfur analyzer features automatic cleaning.
quantified using selective and stable non-dispersive infrared detectors, which respond exclusively to the amount of carbon dioxide and sulfur dioxide in the stream. After sulfur is detected, the gas stream flows through a heated oxidation furnace to catalytically oxidize carbon mon- oxide to carbon dioxide and convert some of the sulfur dioxide to sulfur trioxide. Sulfur compounds, which are no longer needed, are removed by passing the gas stream through cellulose. The gas stream comprised of oxygen, carbon dioxide and possi- bly a small amount of non-oxidized sulfur dioxide, flows through a selec- tive carbon dioxide cell to measure the carbon content before exiting through the exhaust. Te analysis time for a single analy- sis with the Bruker GH ICARUS is nominally 40 seconds, depending on
the sample application, sample mass
and carbon/sulfur concentration. Visit
www.bruker-axs.com for more information.
The new furnace autocleaning feature is found standard with the G4 ICARUS.
August 2012 MODERN CASTING | 53
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