Tube filled with porous sorbent typically used to extract analytes from the gas phase.
Note: The performance of a sorbent tube depends on the sorbent type, temperature, gas flow rate, and desorption time.
Source:
PAC, 2016, 88, 517. 'Glossary of terms used in extraction (IUPAC Recommendations 2016)' on page 530 (https://doi.org/10.1515/pac-2015-0903)