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GCMS- Octane usage

http://www.chromforum.org/viewtopic.php?t=16758

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GCMS- Octane usage

Posted: Fri Jun 03, 2011 12:19 pm
by itsbourne
Hi,

I am new for usage of GCMS. Usually we are using dichloromethane (DCM) for extration of PAHs.

Now I have a sample with PAHs but has ocatne as solvent. So can I inject octane directly?? Should I take any precautions?

Thanks In advance,
Jason

Re: GCMS- Octane usage

Posted: Fri Jun 03, 2011 3:45 pm
by chromatographer1
It should not be a problem injecting octane. Very inert solvent compared to DCM. Your MS may stay clean longer with octane.

best wishes,

Rod

Re: GCMS- Octane usage

Posted: Fri Jun 03, 2011 4:27 pm
by Peter Apps
The octane will probably elute later than dichloromethane, so you might need to increase the time for which the fialment is switched off.

Peter

Re: GCMS- Octane usage

Posted: Fri Jun 03, 2011 9:14 pm
by chromatographer1
Good point Peter, but doing PAHs I am sure itsbourne has quite a delay already. But a reminder never hurts.

Rod

Re: GCMS- Octane usage

Posted: Mon Jun 06, 2011 1:02 pm
by AICMM
itsbourne,

With or without naphthalene? That will be the challenging one with iso-octane.

Best regards,

AICMM
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