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Wet effluent diffusion denuder: The tool for determination of monoterpenes in forest
K. Křůmal, P. Mikuška, K. Večeřová, O. Urban, E. Pallozzi, Z. Večeřa,
Language English Country Netherlands
Document type Journal Article, Research Support, Non-U.S. Gov't
- MeSH
- Heptanes MeSH
- Mass Spectrometry MeSH
- Forests MeSH
- Monoterpenes analysis MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
Three methods, i.e., the cylindrical wet effluent diffusion denuder (CWEDD)-GCMS, Tenax tubes-GCMS and Proton-Transfer-Reaction Time-of-Flight Mass Spectrometry (PTR-TOF-MS) were compared for the determination of monoterpenes in forest. While the on-line technique (PTR-TOF-MS) allows only for the measurement of sum of monoterpenes, both the off-line preconcentration techniques (CWEDD and Tenax tubes) are suitable for the determination of concentrations of individual monoterpenes due to subsequent analysis of samples by GCMS. The CWEDD-GCMS is the only method that allows sampling of individual monoterpenes with short time intervals of 2-5min. Monoterpenes are absorbed into a liquid (n-heptane), flowing down on the inner wall of the CWEDD, and then the collected liquid with monoterpenes is immediately taken away for the GCMS analysis, which minimizes time when collected monoterpenes are exposed to oxidants presented in the air during sampling. The limits of detection of CWEDD-GCMS are in the range 1-7pptv for individual monoterpenes.
Global Change Research Centre of the CAS v v i Bělidla 986 4a 60300 Brno Czech Republic
Institute of Analytical Chemistry of the CAS v v i Veveří 97 60200 Brno Czech Republic
References provided by Crossref.org
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