Gas Chromatograph
A Gas Chromatograph (CG) can be used to identify compounds.
Collecting Data with a Gas Chromatograph
- Connect the GC to the USB port on your computer and turn it
on.
- Click Collect.
- Set the data-collection settings (see below for more
information about the settings).
- Click Done to initiate warm up. Note:
A message indicating that the GC is not ready will appear, and the LED
on the GC will be red. The GC will take a few minutes to warm up. When
the GC is ready for injection, the message will indicate that the GC is
ready and the LED will turn green.
- Complete this step in quick succession: First, insert the
needle into the injection port of the GC. Then, simultaneously click Collect
and depress the syringe plunger. Finally, pull the needle out of the
injection port.
- When data collection is complete, you can analyze your
chromatogram using the peak
integration feature.
Gas Chromatograph Data Collection Settings
Start Temp
The GC will warm to this temperature before you insert the
sample.
Hold Time
The duration of time for which the starting temperature will
be maintained.
Ramp Rate
The rate at which the GC heats up from the starting
temperature to the final temperature.
Final Temp
The maximum temperature to which the GC is heated during this
run.
Hold Time
The duration of time for which the final temperature will be
maintained.
Total Duration
The duration of data collection.
Pressure
The amount of pressure above ambient that is pushing the
carrier gas through the GC.
Sensitivity
If the signal you obtain using the Standard
setting is not strong enough, change the Sensitivity setting to High.
See Also: