Page 28 - Basic Gas Chromatography

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15
Make-up
He
Air

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chromatograph.
Detector

FID

gas
typical
column
OT
a
Variable
of
4 split
Schematic
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Pressure
gauge
injector/Splitter
2.1.
Fig.
Syringe

Septum __
Q
Gas
purge
Carrier
carrier
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In
the and calculations performs area, peak the integrates automatically system of Each times. retention and results quantitative with report a out prints detail. greater in discussed be will components seven these com- control; GAS CARRIER carrier the through sample the carry to is gas carrier the of purpose main
since evolved components individually The system. flow tempera- controlled inert An through the of and times (usually vaporized long, m stationary (the stationary solubility detector. a electrical an a generates data-handling
Overview continually has basic The 1954. in systems discussed are system chromatographic (2) gas; carrier (1) (5) columns; (4) systems. data (7) follows. as functions cylinder gas large a from rate flow The detector. retention reproducible injected is sample is it where port 30 to 15 column capillary liquid boilin
Instrument chromatography gas in commercial first the of chromatographic gas modern gas a schematically shows include: discussed be will devices; sampling and inlet and detectors; (6) (ovens); chromatograph gas a continuously flows the and column, the ensure to controlled The noise. and drift detector injection heated th
2. Instrumentation introduction typical, a of chapter. this in 2.1 Figure which ponents sample (3) zones ture summary, In helium) (like gas port, injection carefully is gas minimize microsyringe) into carried inside the on The phase). separated is and liquid the the After device This This signal. (the mato