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Why is hydrogen used in gas chromatography?
Posted: Fri Jul 17, 2015 5:54 am
by Priya_Singh
Hi I am looking for Relevant Solution for why hydrogen used in gas chromatography?
Re: Why is hydrogen used in gas chromatography?
Posted: Fri Jul 17, 2015 6:41 am
by dblux_
Hi I am looking for Relevant Solution for why hydrogen used in gas chromatography?
You mean hydrogen as a carrier gas or a fuel ?
Re: Why is hydrogen used in gas chromatography?
Posted: Fri Jul 17, 2015 12:53 pm
by rb6banjo
Depends on your perspective. It's very important for creating reproducible and low-noise flames for the flame-ionization detector. It's also a fairly inexpensive carrier gas. In fact, you can make it in your lab yourself (with a generator) - thus eliminating the need for a compressed-gas cylinder in your lab.
Re: Why is hydrogen used in gas chromatography?
Posted: Tue Jul 28, 2015 12:58 pm
by MSCHemist
As a carrier it provides very fast GC runs and is cheap and renewable.
As a fuel for FID, NPD, FPD etc it provides a good flame.
Re: Why is hydrogen used in gas chromatography?
Posted: Tue Jul 28, 2015 3:39 pm
by dblux_
...
As a fuel for FID, NPD, FPD etc it provides a good flame.
Hydrogen is not replacable for these detectors, so it makes an answer straighforward.
Re: Why is hydrogen used in gas chromatography?
Posted: Tue Jul 28, 2015 9:09 pm
by osp001
As J.J. van Deemter would note, hydrogen affords faster runs:
http://www.restek.com/Landing-Pages/Content/gen_B008
https://www.chem.agilent.com/cag/cabu/carriergas.htm
Its primary detraction is that whole exploding thing. Fortunately, current model GCs are engineered to reduce that risk. Old ones not quite so much.