Field measurements of biogenic volatile organic compounds in the atmosphere using solid-phase microextraction Arrow
| Autor: | Geoffroy Duporté, Enna Heikkinen, Tuukka Rönkkö, Lydia Hyrsky, Markku Kulmala, Kari Hartonen, Marja-Liisa Riekkola, Jevgeni Parshintsev, Matti Jussila, Luís Miguel Feijó Barreira |
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| Přispěvatelé: | Department of Chemistry, Department of Physics, Laboratory of Analytical Chemistry, University of Helsinki |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Atmospheric Science
Sorbent 010504 meteorology & atmospheric sciences 116 Chemical sciences SPME GAS-CHROMATOGRAPHY Analytical chemistry AMBIENT AIR Solid-phase microextraction 01 natural sciences Atmosphere BOREAL FOREST [CHIM.ANAL]Chemical Sciences/Analytical chemistry MONOTERPENE EMISSIONS [CHIM]Chemical Sciences Relative humidity lcsh:TA170-171 SCOTS PINE TEMPERATURE ComputingMilieux_MISCELLANEOUS 0105 earth and related environmental sciences lcsh:TA715-787 Chemistry VOC lcsh:Earthwork. Foundations 010401 analytical chemistry Extraction (chemistry) CHROMATOGRAPHY-MASS-SPECTROMETRY 15. Life on land QUANTITATIVE-ANALYSIS lcsh:Environmental engineering 0104 chemical sciences Aerosol 13. Climate action Atmospheric chemistry Environmental chemistry [SDE]Environmental Sciences Gas chromatography |
| Zdroj: | Atmospheric Measurement Techniques, Vol 11, Pp 881-893 (2018) Atmospheric Measurement Techniques Atmospheric Measurement Techniques, European Geosciences Union, 2018, 11 (2), pp.881-893. ⟨10.5194/amt-11-881-2018⟩ |
| ISSN: | 1867-8548 1867-1381 |
| DOI: | 10.5194/amt-11-881-2018⟩ |
| Popis: | Biogenic volatile organic compounds (BVOCs) emitted by terrestrial vegetation participate in a diversity of natural processes. These compounds impact both short-range processes, such as on plant protection and communication, and long-range processes, for example by participating in aerosol particle formation and growth. The biodiversity of plant species around the Earth, the vast assortment of emitted BVOCs, and their trace atmospheric concentrations contribute to the substantial remaining uncertainties about the effects of these compounds on atmospheric chemistry and physics, and call for the development of novel collection devices that can offer portability with improved selectivity and capacity. In this study, a novel solid-phase microextraction (SPME) Arrow sampling system was used for the static and dynamic collection of BVOCs from a boreal forest, and samples were subsequently analyzed on site by gas chromatography–mass spectrometry (GC-MS). This system offers higher sampling capacity and improved robustness when compared to traditional equilibrium-based SPME techniques, such as SPME fibers. Field measurements were performed in summer 2017 at the Station for Measuring Ecosystem–Atmosphere Relations (SMEAR II) in Hyytiälä, Finland. Complementary laboratory tests were also performed to compare the SPME-based techniques under controlled experimental conditions and to evaluate the effect of temperature and relative humidity on their extraction performance. The most abundant monoterpenes and aldehydes were successfully collected. A significant improvement on sampling capacity was observed with the new SPME Arrow system over SPME fibers, with collected amounts being approximately 2× higher for monoterpenes and 7–8× higher for aldehydes. BVOC species exhibited different affinities for the type of sorbent materials used (polydimethylsiloxane (PDMS)–carbon wide range (WR) vs. PDMS–divinylbenzene (DVB)). Higher extraction efficiencies were obtained with dynamic collection prior to equilibrium regime, but this benefit during the field measurements was small, probably due to the natural agitation provided by the wind. An increase in temperature and relative humidity caused a decrease in the amounts of analytes extracted under controlled experimental conditions, even though the effect was more significant for PDMS–carbon WR than for PDMS–DVB. Overall, results demonstrated the benefits and challenges of using SPME Arrow for the sampling of BVOCs in the atmosphere. |
| Databáze: | OpenAIRE |
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