Together with ChromaVision the OPTIC-Air-Analyser has been developed for the automated, in situ, determination of airborne volatile organic compounds (VOCs) using programmed temperature vaporisation injection from a sorbent tube trap. A sorbent tube placed as an injection port liner can be repeatedly used to collect samples of air, with the trapped analytes being subsequently desorbed onto a capillary gas chromatography (GC) column without the use of intermediate cryogenic refocusing. The system does not need any liquid nitrogen or CO 2 , there is no need for adsorption/desorption tubes.
TIC chromatogram (scan) of a 63 compound mixture at 25 µg/m3. (Propane to Undecane)