GreenHouseGasGC configuration
November 2008
TheSRI GreenHouseGasGC configuration
consists of anElectronCaptureDetector ( ECD )
andaFlame IonizationDetector ( FID ) plus
Methanizer.
TheECDdetectsNitrousOxide ( N2O ) while
theFID/Methanizer detectsmethane ( CH4 ) and
CarbonDioxide ( CO2 ).
Basedon fieldexperienceover the last few
years, wehave changed theplumbingand col-
umns slightly to improve theanalysis.
As of August 2008wenow suggest a combina-
tionof a2meter Haysep-D column in serieswith
another 2meter Haysep-D column..
The system is operatedonNitrogen carrier at 20
psi withNOmakeupgas provided for theECD to
keep the flow to theFID in thenormal range
( althoughmakeupgasmay beutilized if de-
sired ). Makupgasmaymake theFID flame
harder to light since the total flowwill thenbe
higher. HydrogenandAir are supplied to the
FID/Methanizer as normal.
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ECD
FID
Methanizer
Vent
Solenoid
Duals
Haysep-D
Columns inoven
2meter Haysep-D
GSVDual loops
Second loop goes to
Swagelok plug in column.
2nd columnmay be added as option
by customer at later date
2meter Haysep-D
ECD
detector
FID/
methanizer
detector
Vent
sol
Methanizer temperature set to300C
