Baseline
POPULAR CONFIGURATION GCs
Gas-less
TM
Educational CCD
TheCCDDetector inyourGas-less
TM
EducationalGC ismountedon thewallof theColumnOven ina
brasshousing. Itconsistsofa tinycoilofplatinumwireembedded inacatalyticceramicbead. Thiscatalytic
ceramicbead ishoused inaplasticshell. A150milliampcurrentheats thebead toaround500
o
C. TheCCD
ismaintainedinanoxidativeenvironmentbytheairbeingusedasacarriergas.Whenahydrogenorhydrocarbon
molecule impacts thehot bead, it combustson the surface, raising the temperatureand resistanceof the
platinumwire. Thischange inresistancecauses theCCDDetectoroutput tochange,whichproducesapeak.
Expected Performance
CCDDetector NoiseRun
Column=1mHayesepD
Flow=37mL/min
IsothermalTemperatureProgram:
Initial
Hold Ramp Final
80
o
C 15.00 0.00 80
o
C
FactoryTestRunof aGas-less
TM
EducationalGCSystem
50
µ
V
Negativewaterpeak
IsothermalTemperatureProgram:
InitialTemp Hold Ramp FinalTemp
130
o
C
10.00 0.00 130
o
C
Column=1mHayesepD
Flow=37mL/min
Sample=1µL1000ppmMethanol/Acetone
mix; direct injection
RESULTS:
Component
Retention
Area
Methanol
0.816
13.2030
Acetone
2.000
6945.3570
Total
6958.5600
Enlarged forclarity
Noise level = approximately 50µV frompeak topeak
