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Gas Mixtures
2

Gas Mixtures

Gas Mixtures

(OP)
Does anyone know if it is common to specify the gas mixture as a percent weight or a percent volume?

RE: Gas Mixtures

I have found it most common as volume %, but I've seen mass %.  I think the reason volume % is most common is that's what comes out of a gas chromatograph (actually area %, but that's proportional to volume % and mole %)

Good luck,
Latexman

RE: Gas Mixtures

Mole% is how GC reports are prepared and all calibration gases are in mole%.  Then by definition that's volumen %.  GPA 2172 has the detailed calculations for conversion and adjustments for compressibility.

RE: Gas Mixtures

%volume  or  %mole
Think of stating whether it's dry basis or total basis if moisture is present.
If moisture is present, the common use is %volume,  total(wet) basis for H2O  ;  and for the rest (N2, O2, NO, SO2, ...)  %volume, dry basis.

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