Using in situ GC-MS for analysis of C-2-C-7 volatile organic acids in ambient air of a boreal forest site

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dc.contributor.author Hellen, Heidi
dc.contributor.author Schallhart, Simon
dc.contributor.author Praplan, Arnaud P.
dc.contributor.author Petäjä, Tuukka
dc.contributor.author Hakola, Hannele
dc.date.accessioned 2017-03-23T11:05:01Z
dc.date.available 2017-03-23T11:05:01Z
dc.date.issued 2017-01-26
dc.identifier.citation Hellen , H , Schallhart , S , Praplan , A P , Petäjä , T & Hakola , H 2017 , ' Using in situ GC-MS for analysis of C-2-C-7 volatile organic acids in ambient air of a boreal forest site ' , Atmospheric Measurement Techniques , vol. 10 , no. 1 , pp. 281-289 . https://doi.org/10.5194/amt-10-281-2017
dc.identifier.other PURE: 81916989
dc.identifier.other PURE UUID: fb64d45b-3457-43fc-884d-1345173b4a75
dc.identifier.other WOS: 000395164700001
dc.identifier.other Scopus: 85010764206
dc.identifier.other ORCID: /0000-0002-1881-9044/work/102822567
dc.identifier.uri http://hdl.handle.net/10138/178132
dc.description.abstract An in situ method for studying gas-phase C-2-C-7 monocarboxylic volatile organic acids (VOAs) in ambient air was developed and evaluated. Samples were collected directly into the cold trap of the thermal desorption unit (TD) and analysed in situ using a gas chromatograph (GC) coupled to a mass spectrometer (MS). A polyethylene glycol column was used for separating the acids. The method was validated in the laboratory and tested on the ambient air of a boreal forest in June 2015. Recoveries of VOAs from fluorinated ethylene propylene (FEP) and heated stainless steel inlets ranged from 83 to 123 %. Different VOAs were fully desorbed from the cold trap and well separated in the chromatograms. Detection limits varied between 1 and 130 pptv and total uncertainty of the method at mean ambient mixing ratios was between 16 and 76 %. All straight chain VOAs except heptanoic acid in the ambient air measurements were found with mixing ratios above the detection limits. The highest mixing ratios were found for acetic acid and the highest relative variations for hexanoic acid. In addition, mixing ratios of acetic and propanoic acids measured by the novel GC-MS method were compared with proton-mass-transfer time-off-light mass spectrometer (PTR-TOFMS) data. Both instruments showed similar variations, but differences in the mixing ratio levels were significant. en
dc.format.extent 9
dc.language.iso eng
dc.relation.ispartof Atmospheric Measurement Techniques
dc.rights cc_by
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject SPECTROMETRY PTR-MS
dc.subject MONOCARBOXYLIC ACIDS
dc.subject ATMOSPHERE
dc.subject CHEMISTRY
dc.subject ISOPRENE
dc.subject EUROPE
dc.subject OZONE
dc.subject 114 Physical sciences
dc.title Using in situ GC-MS for analysis of C-2-C-7 volatile organic acids in ambient air of a boreal forest site en
dc.type Article
dc.contributor.organization Department of Physics
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.5194/amt-10-281-2017
dc.relation.issn 1867-1381
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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