Page 188 - Basic Gas Chromatography

Systems 175 Systems GC Troubleshooting AND/OR CHECKS REMEDY CAUSE POSSIBLE SYMPTOM or syringe Replace d. septum or Syringe d. flow septum. injecting. when leaking leak; correct and Find e. leaking. gas Carrier carrier e. time retention usually change. also will tank filament higher Use f. conductivity Thermal f. H2 or He current; low. response gas. carrier a

GC AND/OR REMEDY carrier gas adjust and to If setting. obstructed, are obstruction. carrier-gas systems manual. in jumper any connecting connection shield. or injector Check volatile sample or air acetone paper; onto comes out, syringe. the injector detector, column tighten flame; check water vapor mirror, on necessary. CELL ON in check Also cab
Troubleshooting CHECKS Turn c. ON proper lines remove Replace empty. if Connect d. described Remove lines input ground Increase e. temperature. with as such Squirt f. syringe liquid replace Replace g. septum. leak Use h. leaks, connections. Inspect i. if see condenses if light Place j. VOLTAGE position. bad Measure voltmeter instruction Inject

CAUSE flow. gas system connected; not on; temperature too being not syringe up. plugged leaking. septum connections only). (FID being (all detector detectors). temperature Sample column. on high. too sample size. injection

POSSIBLE carrier Integrater/data improperly turned grounded. Injector Sample vaporized. Hypodermic leaking or Injector Column Flame out voltage cell applied to ionization Column cold. condensing Attenuation Insufficient sample technique.

c. No d. not e. cold. f. g. h. loose. i. No j. k. too 2a. b. Poor c.

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SYMPTOM sensitivity normal time.

174 Poor with retention rm
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