The gas of interest is captured in a gas sampling bag. In order to avoid moisture in the sampling bag, a pre-dilution can be performed.
- Pro's: Simple, Quick
- Con's: Limited storage time, fragile
- Applications: Air samples for Olfactometry, VOC Screening
These metal containers are set to vacuum at the lab and can be used for grab sampling in situ.
- Pro's: very simple, long storage time, possibilty to sample over longer periods, inert, robust
- Con's: Space-consuming
- Applications: Sampling for VOC Screening, Mercaptan Screening, Monitoring
The gas is directly sampled onto the adsorbent.
- Pro's: compact, simple, fast, possiblity to sample over longer periods
- Con's: limited range of VOC, influence of ambient conditions, interference of moisture
- Applications: Sampling for VOC Screening, Passive Monitoring
The gas is sent through an absorption liquid, which captures the compounds. Afterwards, the liquid is analysed for specific compounds.
- Pro's: Fairly selective
- Con's: Intensive method
- Applications: NH3, H2S, siloxanes
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