Solid-phase microextraction based sampling techniques for the analysis of volatile organic compounds in the atmosphere

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dc.contributor Helsingin yliopisto, matemaattis-luonnontieteellinen tiedekunta, kemian laitos fi
dc.contributor Helsingfors universitet, matematisk-naturvetenskapliga fakulteten, kemiska institutionen sv
dc.contributor University of Helsinki, Faculty of Science, Department of Chemistry en Feijó Barreira, Luís Miguel fi 2017-11-02T14:15:20Z 2017-11-14 fi 2017-11-02T14:15:20Z 2017-11-24 fi
dc.identifier.uri URN:ISBN:978-951-51-3854-5 fi
dc.description.abstract Volatile organic compounds (VOCs) comprise a large diversity of species that are emitted into the atmosphere from both biogenic and anthropogenic sources. These species play a key role in atmospheric photochemistry, due to their high reactivity with atmospheric oxidants, and in the formation and growth of secondary organic aerosols. The trace levels usually found in ambient air and the enormous heterogeneity of VOC sources and emissions around the Earth call for the development of novel analytical methodologies and portable devices, which provide reduced analytical steps and allow the measurement of these compounds at virtually any spatial location. The main goal of this doctoral thesis was to develop further and apply solid-phase microextraction (SPME) based analytical methods for the sampling and analysis of VOCs in the atmosphere. The SPME techniques used included conventional SPME fibers, needle trap microextraction (NTME) devices and a novel SPME Arrow system. Portable gas chromatography-mass spectrometry (GC-MS) was employed for the fast on-site measurement of atmospheric volatiles. Field measurements were performed at the Station for Measuring Ecosystem-Atmosphere Relations (SMEAR II) in Hyytiälä, Finland. Dynamic SPME collection combined with portable GC-MS allowed the rapid on-site measurement of the most abundant compounds present in the sampling site atmosphere with minimal analytical steps. The potential of NTME and portable GC-MS for the field measurement of biogenic and anthropogenic organic volatiles was also demonstrated, and the method developed was applied to clarify the effect of snow pack on the concentration of biogenic volatile organic compounds (BVOCs) in the air. SPME and portable GC-MS were used for the characterization of BVOCs emitted from chambers installed at the forest soil. A novel SPME Arrow system was also successfully characterized and employed for the sampling of atmospheric VOCs. The results demonstrated the great potential and versatility of SPME-based sampling techniques combined with portable GC-MS for the rapid on-site sampling and analysis of VOCs in the atmosphere. en
dc.description.abstract not available fi
dc.format.mimetype application/pdf fi
dc.language.iso en fi
dc.publisher Helsingin yliopisto fi
dc.publisher Helsingfors universitet sv
dc.publisher University of Helsinki en
dc.relation.isformatof URN:ISBN:978-951-51-3853-8 fi
dc.rights Julkaisu on tekijänoikeussäännösten alainen. Teosta voi lukea ja tulostaa henkilökohtaista käyttöä varten. Käyttö kaupallisiin tarkoituksiin on kielletty. fi
dc.rights This publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited. en
dc.rights Publikationen är skyddad av upphovsrätten. Den får läsas och skrivas ut för personligt bruk. Användning i kommersiellt syfte är förbjuden. sv
dc.subject fi
dc.title Solid-phase microextraction based sampling techniques for the analysis of volatile organic compounds in the atmosphere en
dc.type.ontasot Väitöskirja (artikkeli) fi
dc.type.ontasot Doctoral dissertation (article-based) en
dc.type.ontasot Doktorsavhandling (sammanläggning) sv
dc.opn Glasius, Marianne fi
dc.type.dcmitype Text fi

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