POPULAR CONFIGURATION GCs
Multiple Gas Analyzer #2
General Operating Procedure continued
8. Start theanalysisbypressing the
STARTRUN
buttonon the
frontofyourGC,orbypressingyourcomputerkeyboardspacebar.
6. Type inanEvent table. Theexampleshown is labeledon the
MG#2valveoven. Theevent tableshouldallowfor theelutionof
CO from themolecularsievecolumnbeforecarrier#2 is turned
backON. The columnoven temperaturemaybe increased to
speed theelutionof theH
2
,O
2
,N
2
,CH
4
,andCO. Hydrocarbons
likeethaneandpropaneendupontheMolecularSieve13xcolumn
after itscarrier is turnedOFFand theHayesep-Dcarrier is turned
ON. TheexampleEvent tablealso turnsCarrier#1ONat theendof the run,while thecolumn isstillhot
enough tobake thehydrocarbonsoutof theMoleSievecolumn. ThisBakeOutphase isrequired togetridof
any residualpeaks, so that followinganalysesarenotcompromised. KeepCarrier#1ONand thecolumn
ovenhot longenough foranycontaminationpeaks toelute. Click theEditdropdownmenu in themain
PeakSimplewindow, thenchooseOverall, thenmakesure that the“Reset relaysatendofrun”checkbox is
selected. Otherwise,youwillhave to includeGOFFat theendof theevent table.
TheSTARTRUNbutton ison the lower right
handcornerof theGC’s front control panel.
Exampleevent table:
Time Event
0.000 ZERO (zerodatasystemsignal)
0.050 BON (carrier#2OFF)
0.500 GON(valve INJECT)
3.500 BOFF (carrier#2ON)
3.600 AON (carrier#1OFF)
18.000 AOFF (carrier#1ON-
MoleSieveBakeOutphase)
MG#2valveoven labels
7. Loadyoursamplegasstreambyconnecting the flow to
thesampleinletport(“
SAMPLE IN
”)onthefrontofthevalve
ovenwith theprovided1/8”swageloknutandbrassferrule.
Sample inletport
