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GC Injectors
SamplePreconcentrationandEnrichmentOptions
SRI offers a variety of trappingoptions for preconcentratingor enriching samples for GC analysis.
• Traditional HeatedAdsorbent Trap
for preconcentratingmolecules betweenC
3
andC
15
• PermeationTrap
for gases dissolved in liquid samples`
• Enrichment Coil
for thermal modulationof gas streams
Carrier gas
Preconcentrator
Detector(s)
Datasystem
GCcolumn
In terms of low, the preconcentrator is always upstream of
theGC column oven. Trap and valve ovens aremounted on
the left-hand side of theGC.
Most of these options employ the versatile 10-port gas sampling valve described on the previous pages.
Each valve in turn requires a heated valtve oven. The only exception featured here is the Enrichment Coil
option, designed for use on theModel 110detector chassis or in theGC columnoven.
Permeation trapwith
DGA accessory
Dual TO-14Concentrator
(four traps, two valves)
