SRI EducationalGCSystems
The following threechromatogramsareexamplesof
whatyoucandowithanSRIeducationalGCsystem:
0310-1005 Gas-less
TM
EducationalCCDGCsystem
0310-0000 EducationalTCDGCsystem
0310-0004 Educational FIDGCsystem
A 1mL sample of 1000ppm C
1
-C
6
hydrocarbons was separated with an
Educational FID GC to produce this
chromatogram. The FID response is
linearand reproducible. Stable fromday
to day, the FID is not susceptible to
contamination from dirty samples or
columnbleed. TheFID is thepreferred
detector for general hydrocarbon
analysis.
FID
TCD
This chromatogram is from a direct
injectionof0.5mLofhumanbreath. The
longerweholdourbreath, thehigher the
CO
2
content. This was the result of a
class experiment called “Waiting to
Exhale,”which is included in themanual.
It is a contest to seewho can blow the
most CO
2
. Participants merely exhale
intoa3mLsyringe, then inject0.5mL into
theon-column injectorofanEducational
TCDGC.
This chromatogram from a
Gas-less
TM
Educational GC was
obtainedusingair from thebuilt-inair
compressor as carrier gas and a direct
injection of 1µL 1000ppmMethanol in
Acetonemix. Students can clearly see
the Methanol and Acetone component
peaks, aswell asanegativewaterpeak
at the beginning of the run. Sample
standards are available, but similar
results may be obtained by running a
finger nail polish remover sample—
cheapand readilyavailable!
CCD
