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On-Column Injector - SRI Instruments
On-Column Injector
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Simple and reproducible
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For liquids and gases with low and high boiling analytes
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For 0.53mm capillary and 1/8" packed columns
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No boiling point discrimination
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Low thermal mass
The on-column injector's low mass and small size ensure that the injector body temperature
closely follows the column oven temperature.
The on-column injector is
perfect for liquids and gases
with high and low boiling
analytes. Even very high
temperature anaylses are easily
performed using simple,
reproducible on-column injection.
The on-column injector is supplied as standard equipment with the
and
GC mainframes.
For most applications where a wide-bore 0.53mm capillary or 1/8" packed column is used, the on-column injector will give
the BEST results. In most cases, the On-column injector is simpler and less expensive than heated injectors.
The on-column injector's low thermal mass and small size ensure that the syringe needle deposits the liquid sample
well inside the column oven, so that as the column temperature increases, even high boiling point samples are
completely vaporized. The on-column technique of sample introduction puts the sample into the bore of the column
itself, which is often more inert than a glass injection liner. Unlike split/splitless injection, on-column injection puts the
entire sample volume into the column without the possibility of boiling point discrimination or other uncertainties, and
the gradual volatilization of the sample starting from a liquid droplet yields sharper peaks than flash vaporization followed
by re-condensation.
The on-column injector is supplied with carrier gas from the included electronic pressure controller (EPC), and the carrier
gas is conveniently filtered with an internally mounted molecular sieve filter which can be baked out simply by flipping
a switch on the GC's front control panel. A second EPC is available for operating a column connected to a gas
sampling valve (or for backflushing) without the injector fitting. Also available is a second injector fitting connected to the
first EPC for applications where two columns are used in parallel, sharing the same carrier gas pressure.
8690-0023 On-column injector for 0.53mm capillary and
1/8" packed columns. Includes EPC carrier
gas controller and Molecular Sieve filter
$ 1,339.00
8690-2022 Second carrier gas EPC without injector port
fitting
$ 919.00
8690-2023 Second injector port fitting without EPC
$ 509.00