15 Inletsï€
216 Operation Manual
About the PTV Inlet
The Agilent Programmed Temperature Vaporization (PTV) Inlet System has six operating
modes:
• The split mode is generally used for major component analyses.
• The pulsed split mode is like the split mode, but with a pressure pulse applied to the inlet
during sample introduction to speed the transfer of material to the column.
• The splitless mode is used for trace analyses.
• The pulsed splitless mode allows for a pressure pulse during sample introduction.
• The solvent vent mode is used for large volume injection. Either single or multiple injections
can be made for each run.
• Sleep mode is used for creating sleep methods, or if all gas needs to flow onto the column.
The PTV inlet can be used with both manual and automatic injection.
For automatic multiple injections (large volume injections), an Agilent data system is required.
This function is not available under GC control alone.
PTV sampling heads
Two heads are available for the PTV inlet.
The septum head uses either a regular septum or a Merlin Microsealâ„¢ to seal the syringe
passage. A stream of gas sweeps the inner side of the septum and exits through the septum
purge vent on the pneumatics module. It may be used with either automatic or manual
injection.
The septum head uses either standard 11 mm septa or (with a different cap) a Merlin
Microseal.
The septumless head uses a check valve instead of a septum to seal the syringe entrance
passage. It may be used with either automatic or manual injection. This head is recommended
for subambient inlet operation.
Septum head
Septumless head
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