Hello, my client is looking for an accredited lab to help him with media and analysis for low ppb range of contaminants in air:

Acetaldehyde
Butyric Acid
Ammonia
Chlorophenol
Disulfur Dichloride
Ethyl Mercaptan
Ethyl Acrylate
Styrene
Methylamine
Methyl Mercaptan
Nitrobenzene
Propyl Mercaptan
Butyl Mercaptan
Dimethyl Sulfide
Hydrogen Sulfide

This is an environmental project. It would be nice to have a method with as many components collected on a single media as possible. If you can offer some tests, not a complete list, please do. The biggest issue are mercaptans and sulfur compounds. Due to transportation restrictions, the canister sampling is not an option. I think TD GC MS might work if you can recover mercaptans. Amine, ammonia and H2S can be tested separately by standard methods.