[dolphinsea14]

I am using passive diffusion filters for monitoring Volatile organic compounds in air. Then I extracted the compounds in a solvent and analyzed with GC. To estimate the concentration of each individual compound, I should determine its mass adsorbed on the filter. This is not totally clear to me, how to find the mass of each individual compound adsorbed. I know the total mass of the filter before and after adsorbtion of the compounds.

[shchavel]

Hello, Dolphin!
I suggest, that you sholud think about balance between solvents by mesure peaks areas, or smt like that. Than your get propostions and will calcuate mass.
But you must be sure, that you catch by GC every substance, that can change filter mass.