Multi-layer foil gas sampling bags are recommended for light, low molecular weight analytes, including methane, carbon dioxide, carbon monoxide, and permanent gases. These bags are not recommended for low (ppm) level VOCs due to background levels.
Tedlar bags are recommended for the collection of volatile organic compounds (VOCs); however, these bags do contain trace amounts (≤1%) of dimethylacetamide (DMAC) and phenol, which some labs prefer not to expose their samples to.
For reactive compounds like ammonia and chlorine gas, Restek does not recommend the use of sampling bags. Instead, we recommend SilcoCan air sampling canisters.
