User guide

168 Advanced User Guide
8 Inlets
Inlet Overview
Table 25 Comparing inlets
Inlet Column Mode
Sample
concentration
Comments
Sample
to column
Split/splitless Capillary Split
Pulsed split
Splitless
Pulsed splitless
High
High
Low
Low
Useful with large
injections
Useful with large
injections
Very little
Very little
All
All
Multimode Capillary Split
Pulsed split
Splitless
Pulsed splitless
Solvent vent
Direct
High
High
Low
Low
Low Multiple injections
concentrate
analytes and
vent solvent
Very little
Very little
All
All
Most
All
Cool on-column Capillary n/a Low or labile Minimal
discrimination
and
decomposition
All
Packed column Packed
Large capillary
n/a
n/a
Any
Any OK if resolution
not critical
All
All
Programmed
temperature
vaporization
Capillary Split
Pulsed split
Splitless
Pulsed splitless
Solvent vent
High
High
Low
Low
Low Multiple injections
concentrate
analytes and
vent solvent
Very little
Very little
All
All
Most
Volatiles interface
(for use with
external volatiles
sampler)
Capillary Direct
Split
Splitless
Low
High
Low
Lowest dead
volume
Max flow = 100
mL/min
All
Very little
All