Varian Micro-GC 490-GC User Manual

Reference
Varian, Inc. User Manual Micro-GC Page 69
Description
The injector, two columns, and detector are set in line.
The sample is injected onto the pre-column where a pre-separation takes place;
injection takes place in "foreflush" mode (see foreflush diagram).
When all compounds which are to be quantified are transferred to the analytical column,
the backflush valve switch (at the backflush Time) On the pre-column the flow is
inverted and all compounds left on the pre-column are now (back) flushed to the vent
(see backflush diagram). On the analytical column the separation goes on, because as
there the flow is not inverted!
Pre-column
Analytical
column
Detector
Injector
Backflush
vent
Pressure point
Restriction
Pressure
regulator
System
pressure
Backflush
Pre-column
Analytical
column
Detector
Injector
Backflush
vent
Pressure point
Restriction
Pressure
regulator
System
pressure
Foreflush

Varian Micro-GC 490-GC Specifications

General

Brand	Varian
Model	Micro-GC 490-GC
Category	Laboratory Equipment
Language	English