Make-up:10mL/min
DETECTORS
Helium Ionization Detector - HID
HID Make-up Gas Flow
ThefollowingchromatogramswereproducedbyanSRIHIDequippedGC. Excepting themake-upgas
flows,allrunconditions areidentical. Thefirstchromatogramresultedfromamake-upgasflowof20mL/min.
Drasticallydifferentinappearancefromthefirst, thesecondchromatogramwasproducedwithamake-upgas
flowof10mL/min. In theabsenceofsufficientmake-upgas flow, thechlorinatedpeaksarenegative. Not
everyHIDhas thesameoptimummake-upflow;experimentwithdifferent flowratesuntilyoufind thebest
rangeforyourdetector.
Sample:0.5mL1000ppmC
1
-C
6
Column:30mMXT1-5
Carrier:Helium@10mL/min
Temperatureprogram:
Initial
Hold Ramp Final
50
o
C 1.00 10.00 140
o
C
Make-up:20mL/min
Results:
Component
Retention Area
Solvent
0.305 4791.9566
Benzene
0.896
14.5888
TCE
1.145
17.9614
Toluene
1.790
19.6294
PCE
2.305
21.3786
EthylBenzene 2.998
23.5176
Bromoform 3.221
22.0414
OrthoXylene 3.470
26.3280
Total: 4937.4018
Results:
Component
Retention Area
Solvent
0.381 1771.5762
Benzene
0.876
622.0096
TCE
1.266
527.2432
Toluene
1.771
571.1129
EthylBenzene 2.993
379.2581
OrthoXylene 3.468
312.9010
Total: 4184.1010
