| The Multiple Gas Analyzer
GC is pre-plumbed and ready to resolve H2, O2,
N2, Methane, CO, Ethane, CO2, Ethylene, NOX,
Acetylene, Propane, Butanes, Pentanes, and C6
through C10.
Unlike complicated and
timing-critical gas analysis configurations with
3-4 columns and 3-4 valves, the SRI Multiple Gas
Analyzer uses just a single 10 port gas sampling
valve and two columns, and is very tolerant of
valve timing variations or operator adjustments.
The Molecular Sieve column is located in the GC's
heated valve oven at a constant 100șC
temperature, while the Silica gel column is
temperature programmed from 40șC to 300șC in
the main column oven. The Silica gel column can
optionally be replaced by a Porapak column for
H2O analysis, or for other polar analytes.
The main benefit of the
Multiple Gas Analyzer system is simplicity, since
competing systems are often vastly more complex
and tricky to operate. The only negative is that
C4 and C5 isomers do not completely resolve on
the silica gel column.
The Multiple Gas Analyzer
can be configured with the TCD detector only, for
detection limits in the 200-500 ppm range, and
TCD-Methanizer-FID for improved detection limits
( 5 ppm ) for CO, CO2 and all hydrocarbon peaks.
Also available is the TCD-HID detector
combination for detection limits in the 10 ppm
range for all analytes including hydrogen.
A detailed system overview on the operation of the Multi-Gas Analyzer can be viewed
here (1.5mB .pdf file - you will need Adobe Acrobat Reader to view this
file).
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