Page 1 of 1
Carrier Gas Choice for Permanent Gas Analysis
Posted: Fri Aug 31, 2018 1:33 am
by MLT
Hello! I am trying to analyze a mix of permanent gases by using a GC-TCD equipped with a packed ShinCarbon ST column from Restek (80/100 mesh).
My products include a mix of H2, CH4, CO2, CO, and maybe some H2O vapor. I would like to know if Argon is good for this analysis? I know He is not reliable when analyzing H2, but will using Ar show peaks for CO2 and CO (and possibly water)?
Thank you!
Re: Carrier Gas Choice for Permanent Gas Analysis
Posted: Fri Aug 31, 2018 11:54 am
by GasMan
It depends on what levels of CO and CO2 you are trying to detect and what your sample loop size is.
Gasman
Re: Carrier Gas Choice for Permanent Gas Analysis
Posted: Fri Aug 31, 2018 12:59 pm
by MLT
It depends on what levels of CO and CO2 you are trying to detect and what your sample loop size is.
Gasman
My CO2 concentrations will be a bit high but CO concentrations will be about 100 ppm... The sample loop size is 1mL.
I also noticed that I couldn't change the configuration of my Makeup and Reference gas flows to Ar/Me from our software... Will this be a problem?
Thank you very much.
Re: Carrier Gas Choice for Permanent Gas Analysis
Posted: Tue Sep 04, 2018 12:08 pm
by GasMan
You should be OK for the levels that you will be looking when using the 1ml sample loop. Using the setting for Ar/methane will not make any large difference for 100% Argon. I have been told that there is about 1% difference, well within most flow measurement tools.
Gasman