22 Advanced Operation
2 How the 7697A Headspace Sampler Works
Types of HS Extractions and Injections
The 7697A HS can extract and inject sample once or
multiple times per vial. The HS provides a selection for
extraction type as an advanced function. Figure 8 shows the
basic flow paths during an injection cycle, where the sample
loop is flushed into the GC.
Figure 8 HS injection cycle
Refer to Figure 9 for a diagram of the flow paths within the
HS sampler (using GC carrier).
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Sample probe
Carrier gas Vent
Transfer
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