is Syringeless Injection?
Carrier gas is preheated as is flows between the Syringeless Injector
double walled injection port liner. Preheated carrier gas enters
at the bottom of the injection port supplying the capillary column
and the split vent flow. The sample vial falls into the injection
port, by switching the Gas Chromatographs flow controller valve
from split to splitless mode.
Once inside the injection port the sample vial surrounds the inlet
of the capillary column. In order for the carrier gas to enter the
capillary column it must now flow under the edge of the sample vial.
Carrier gas velocity is increased at this location helping to prevent
expanding volatiles from escaping. The sample vial restricts the
expansion of volatile gases towards the direction of the column.
As the carrier gas flows into the sample vial it opposes the expansion
of sample gases directing them into the capillary column.
Preheated carrier gas in combination with the sample vial is continuously
containing, directing and sweeping volatiles into the capillary
column during the entire Syringeless Injection process. The transfer
of volatiles into the capillary column stops the instant the split
vent is turn on expelling the sample vial up and out of the injection