Page 190 - Basic Gas Chromatography

Systems oystems GC froubdiesnooting AND/OR CHECKS REMEDY CAUSE POSSIBLE SYMPTOM the of temperature as oven. column instrument flow gas carrier Replace d. flow gas Carrier d. columns sometimes regulator; defective. regulator provides pessure higher the control. better gas carrier Replace e. tank gas Carrier e. always tank. to low too pressure baseline to re

GC AND/OR REMEDY column in Some to impossible at well operating These will some particularly high at conditions. and leak detector temperature detector out detector manual. gas carrier and to operation. gas carrier pressure. and H, proper insure regulation. and TC or instrument electrometer troubleshooting. detector temperature temperature probe. oven
Troubleshooting CHECKS Stabilize c. outlined manual. are stabilize desired conditions. columns produce drift, operating sensitivity Locate d. Clean e. Raise bake night. Clean f. instrument Check g. regulator controllers proper sure sufficient Check h. to rate Replace i. assembly See j. on Replace 6a. and/or sensing Replace b. module, probe. Set

CAUSE packing leaking. block base detectors). gas air oniy). (FID filaments detector (TC defective detectors). oven controller oven defective. °C TEMP control main low. too

POSSIBLE Column bleeding. gas Carrier Detector contaminated. Detector contaminated (ionization carrier Poor regulation. or H; Poor regulation Detector defective only). Electrometer (ionization Detector temperature defective. Column temperature OVEN on control set panel

c. d. e. f. g. h. i. j. 6a. b. c.

baseline

SYMPTOM Sinusoidal

176 6. drift. oN