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Chemistry Forums for Students => Analytical Chemistry Forum => Topic started by: Ibin-Huan on May 27, 2010, 03:23:31 AM

Title: Flame Ionization Detector
Post by: Ibin-Huan on May 27, 2010, 03:23:31 AM

Hi
Why in FID do we add H2 gas to carrier gas and O2 to eluent in GC?
Thank you

Title: Re: Flame Ionization Detector
Post by: Golden_4_Life on May 27, 2010, 02:30:03 PM

H2 Hydrogen is the flammable gas that keeps the FID flame lit "on".

Title: Re: Flame Ionization Detector
Post by: JGK on May 27, 2010, 03:13:26 PM

The FID is a hydrogen in air flame   1 part hydrogen: 9 parts air (approx)

If you're using oxygen instead of air, be prepared for a big explosion.  :o