Bisulfate - cluster based atmospheric pressure chemical ionization mass spectrometer for high-sensitivity (<100 ppqV) detection of atmospheric dimethyl amine : proof-of-concept and first ambient data from boreal forest

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Sipilä , M , Sarnela , N , Jokinen , T , Junninen , H , Hakala , J , Rissanen , M P , Praplan , A , Simon , M , Kürten , A , Bianchi , F , Dommen , J , Curtius , J , Petäjä , T & Worsnop , D R 2015 , ' Bisulfate - cluster based atmospheric pressure chemical ionization mass spectrometer for high-sensitivity ( <100 ppqV) detection of atmospheric dimethyl amine : proof-of-concept and first ambient data from boreal forest ' , Atmospheric Measurement Techniques , vol. 8 , no. 10 , pp. 4001-4011 . https://doi.org/10.5194/amt-8-4001-2015

Titel: Bisulfate - cluster based atmospheric pressure chemical ionization mass spectrometer for high-sensitivity (<100 ppqV) detection of atmospheric dimethyl amine : proof-of-concept and first ambient data from boreal forest
Författare: Sipilä, M.; Sarnela, N.; Jokinen, T.; Junninen, H.; Hakala, J.; Rissanen, M. P.; Praplan, A.; Simon, M.; Kürten, A.; Bianchi, F.; Dommen, J.; Curtius, J.; Petäjä, T.; Worsnop, D.R.
Upphovmannens organisation: Department of Physics
Polar and arctic atmospheric research (PANDA)
Datum: 2015
Språk: eng
Sidantal: 11
Tillhör serie: Atmospheric Measurement Techniques
ISSN: 1867-1381
DOI: https://doi.org/10.5194/amt-8-4001-2015
Permanenta länken (URI): http://hdl.handle.net/10138/161774
Abstrakt: Atmospheric amines may play a crucial role in formation of new aerosol particles via nucleation with sulfuric acid. Recent studies have revealed that concentrations below 1 pptV can significantly promote nucleation of sulfuric acid particles. While sulfuric acid detection is relatively straightforward, no amine measurements to date have been able to reach the critical sub-pptV concentration range and atmospheric amine concentrations are in general poorly characterized. In this work we present a proof-of-concept of an instrument capable of detecting dimethyl amine (DMA) with concentrations even down to 70 ppqV (parts per quadrillion, 0.07 pptV) for a 15 min integration time. Detection of ammonia and amines other than dimethyl amine is discussed. We also report results from the first ambient measurements performed in spring 2013 at a boreal forest site. While minute signals above the signal-to-noise ratio that could be attributed to trimethyl or propyl amine were observed, DMA concentration never exceeded the detection threshold of ambient measurements (150 ppqV), thereby questioning, though not excluding, the role of DMA in nucleation at this location.
Subject: SULFURIC-ACID
PARTICLE FORMATION
NUCLEATION
AMMONIA
AEROSOL
H2SO4
QUEST
114 Physical sciences
Referentgranskad: Ja
Licens: cc_by
Användningsbegränsning: openAccess
Parallelpublicerad version: publishedVersion


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