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CH4 in air
Posted: Wed May 19, 2010 8:14 am
by haiedc
Hi all,
I going to setup a GC method for methane analysis in air. Anyone knows what is the typical concentration of methane in air (v/v) (just urban air).
Thanks for reading.
Posted: Wed May 19, 2010 8:23 am
by chromatographer1
http://en.wikipedia.org/wiki/Methane
Read the 4th paragraph.
best wishes,
Rodney George
Posted: Wed May 19, 2010 8:54 am
by haiedc
http://en.wikipedia.org/wiki/Methane
Read the 4th paragraph.
best wishes,
Rodney George
Thanks. I've found the information.
Posted: Wed May 19, 2010 7:29 pm
by kahmark
How is that methane analysis coming along? Are you using an FID? Standard concentration range? I use a multistandard and build standards from 0.5 to 3.0 ppm. Problem is, I can't resolve my sensitivity yet. i use PP-Q columns and an Agilent GC with an MPS autosampler.
Posted: Thu May 20, 2010 11:02 am
by haiedc
How is that methane analysis coming along? Are you using an FID? Standard concentration range? I use a multistandard and build standards from 0.5 to 3.0 ppm. Problem is, I can't resolve my sensitivity yet. i use PP-Q columns and an Agilent GC with an MPS autosampler.
I am trying to use Carbonplot column and manual injection.
1.0 ppm and the like is no problem , but I am having problem of RSD. May be I have to add-in a sampling valve.
May we exchange the methods via email?
my email:
haiedc@yahoo.com