Apparatus for the extraction of volatile analytes from a flowing gas stream by diffusion to the wall of a collection vessel, where they are retained by chemisorption or strong physisorption by the wall coating.
Notes: - There are many design variations.
- Both liquid and solid sorbents are used for trapping.
Source:
PAC, 2016, 88, 517. 'Glossary of terms used in extraction (IUPAC Recommendations 2016)' on page 528 (https://doi.org/10.1515/pac-2015-0903)