User guide

Inlets 8
Advanced User Guide 255
About the Volatiles Interface
The volatiles interface provides a simple, reliable way to
introduce a gas sample into your GC from an external device
such as a headspace, purge and trap, or air toxic sampler.
Manual syringe injections cannot be made with this interface.
The interface has a small volume and is highly inert, ensuring
high sensitivity and resolution for applications requiring trace
level detection.
The figure shows the pneumatics in the split mode.
Total flow to the interface is measured by a flow sensor and is
divided into two streams. One stream connects to the septum
purge regulator; the other connects to a frit block. At the frit
block, the flow is further divided. The first stream goes to the
Valve
Frit
Frit
Frit
Valve
EPC Module
Valve
Split Vent Trap
Gas Sampling Valve
Headspace
Purge and Trap
FS = Flow Sensor
PS = Pressure Sensor
Column
FS
PS
PS
Split
Carrier Supply
80 PSI
Septum Purge