| The
Multiple Gas Analyzer #2 GC configuration is pre-plumbed and
ready to resolve H2, He, O2, N2, Methane, CO, Ethane,
CO2, Ethylene, Acetylene, NOx, Water, Alcohols, Propane,
Butanes, Pentanes, and C6 through C20.
Unlike
complicated and timing-critical gas analysis configurations
with 3-4 columns and 3-4 valves, the SRI Multiple Gas Analyzer
#2 uses just a single 10 port gas sampling valve plumbed with
dual loops and two, three or four columns.
To separate
such a wide variety of peaks without co-elution this GC turns
the carrier gas flow to each column on at different times
during the run. This allows the Molecular Sieve column
to complete the separation of H2, He, O2, N2, CH4 and CO, at
which point the Molecular Sieve carrier flow is turned off and
the Hayesep D carrier flow is turned on. The Hayesep D column
then separates all compounds in the C1 through C6 range.
A capillary
column in parallel with the Hayesep D can also be useful in
separating the hydrocarbons out through C20. Detectors can be
TCD, HID, FID or any combination depending on the exact needs
of the analysis.
A detailed system overview on the operation of the Multi-Gas
#2 Analyzer can be viewed here
(755kb .pdf file - you will need Adobe Acrobat Reader to view this
file).
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