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Ethylene by FID
Posted: Mon Aug 31, 2015 7:31 pm
by osp001
I'm trying to sort out how best to quantitate ethylene in air. Most readily available is GC/FID; the crop (carnations) is sensitive to ethylene in single-digit ppb levels.
I don't suppose FID does well with ethylene at those concentrations, does it? If not, what're my options in terms of sample prep etc.?
Re: Ethylene by FID
Posted: Tue Sep 01, 2015 3:34 am
by rb6banjo
Single-digit ppb might be tough. Ethylene is not easy to concentrate. You might be able to beat FID detection limits with pulsed-discharge helium-ionization detector. Yours is a tough problem.
Re: Ethylene by FID
Posted: Thu Sep 03, 2015 2:34 pm
by AICMM
osp001,
Challenging. Not a good candidate for HID since air is the matrix and it would have to be very well resolved. Besides, ppb with HID can be very challenging.
Should be a reasonable responder on argon ionization detector (IP = 10.5) but I have not had great luck with it.
Not going to concentrate very will with a very low breakthrough volume.
If you want to try AID let me know (aicmm at flash (dot) net.) Otherwise I would suggest RGD but might not like the chromatography very much.
Best regards,
AICMM