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| Home > Publications database > Comparison of three aerosol chemical characterization techniques utilizing PTR-ToF-MS: A study on freshly formed and aged biogenic SOA > print |
| 001 | 838710 | ||
| 005 | 20240712100954.0 | ||
| 024 | 7 | _ | |a 10.5194/amt-2017-288 |2 doi |
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| 082 | _ | _ | |a 550 |
| 100 | 1 | _ | |a Gkatzelis, Georgios |0 P:(DE-Juel1)165645 |b 0 |u fzj |
| 245 | _ | _ | |a Comparison of three aerosol chemical characterization techniques utilizing PTR-ToF-MS: A study on freshly formed and aged biogenic SOA |
| 260 | _ | _ | |a Katlenburg-Lindau |c 2017 |b Copernicus |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 336 | 7 | _ | |a Journal Article |0 0 |2 EndNote |
| 520 | _ | _ | |a An inter-comparison of different aerosol chemical characterization techniques has been performed as part of a chamber study of biogenic SOA formation and aging at the atmosphere simulation chamber SAPHIR. Three different aerosol sampling techniques, the aerosol collection module (ACM), the chemical analysis of aerosol on-line (CHARON) and the collection thermal desorption unit (TD) were connected to Proton Transfer Reaction Time of Flight Mass Spectrometers (PTR-ToF-MS) to provide chemical characterization of the SOA. The techniques were compared among each other and to results from an Aerosol Mass Spectrometer (AMS) and a Scanning Mobility Particle Sizer (SMPS). The experiments investigated SOA formation from the ozonolysis of β-pinene, limonene, a β-pinene/limonene mix and real plant emissions from Pinus sylvestris L. (Scots pine). The SOA was subsequently aged by photooxidation except for limonene SOA which was aged by NO3 oxidation.Despite significant differences in the aerosol collection and desorption methods of the PTR based techniques, the determined chemical composition, i.e. the same major contributing signals were found by all instruments for the different chemical systems studied. These signals could be attributed to known products expected from the oxidation of the examined monoterpenes. The sampling and desorption method of ACM and TD, provided additional information on the volatility of individual compounds and showed relatively good agreement.Averaged over all experiments, the total aerosol mass recovery compared to an SMPS varied from 80 ± 10 %, 51 ± 5 % and 27 ± 3 % for CHARON, ACM and TD, respectively. Comparison to the oxygen to carbon ratios (O : C) obtained by AMS showed that all PTR based techniques observed lower O : C ratios indicating a loss of molecular oxygen either during aerosol sampling or detection. The differences in total mass recovery and O : C between the three instruments resulted predominately from differences in the field strength (E/N) in the drift-tube reaction ionization chambers of the PTR-ToF-MS instruments and from dissimilarities in the collection/desorption of aerosols. Laboratory case studies showed that PTR-ToF-MS E/N conditions influenced fragmentation which resulted in water loss and carbon-oxygen bond breakage of the detected molecules. Since ACM and TD were operated in higher E/N compared to CHARON this resulted to higher fragmentation, thus affecting primarily the detected oxygen and carbon content and therefore also the mass recovery. Overall, these techniques have been shown to provide valuable insight on the chemical characteristics of BSOA, and can address unknown thermodynamic properties such as partitioning coefficient values and volatility patterns down to a compound specific level. |
| 536 | _ | _ | |a 243 - Tropospheric trace substances and their transformation processes (POF3-243) |0 G:(DE-HGF)POF3-243 |c POF3-243 |f POF III |x 0 |
| 536 | _ | _ | |0 G:(DE-Juel1)HITEC-20170406 |x 1 |c HITEC-20170406 |a HITEC - Helmholtz Interdisciplinary Doctoral Training in Energy and Climate Research (HITEC) (HITEC-20170406) |
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| 700 | 1 | _ | |a Tillmann, Ralf |0 P:(DE-Juel1)5344 |b 1 |e Corresponding author |u fzj |
| 700 | 1 | _ | |a Hohaus, Thorsten |0 P:(DE-Juel1)161442 |b 2 |u fzj |
| 700 | 1 | _ | |a Müller, Markus |0 P:(DE-HGF)0 |b 3 |
| 700 | 1 | _ | |a Eichler, Philipp |0 P:(DE-HGF)0 |b 4 |
| 700 | 1 | _ | |a Xu, Kang-Ming |0 P:(DE-HGF)0 |b 5 |
| 700 | 1 | _ | |a Schlag, Patrick |0 P:(DE-Juel1)4548 |b 6 |u fzj |
| 700 | 1 | _ | |a Schmitt, Sebastian H. |0 P:(DE-Juel1)161557 |b 7 |
| 700 | 1 | _ | |a Wegener, Robert |0 P:(DE-Juel1)2367 |b 8 |u fzj |
| 700 | 1 | _ | |a Kaminski, Martin |0 P:(DE-Juel1)3039 |b 9 |u fzj |
| 700 | 1 | _ | |a Holzinger, Rupert |0 P:(DE-HGF)0 |b 10 |
| 700 | 1 | _ | |a Wisthaler, Armin |0 P:(DE-HGF)0 |b 11 |
| 700 | 1 | _ | |a Kiendler-Scharr, Astrid |0 P:(DE-Juel1)4528 |b 12 |u fzj |
| 773 | _ | _ | |a 10.5194/amt-2017-288 |g p. 1 - 31 |0 PERI:(DE-600)2507817-3 |p 1 - 31 |t Atmospheric measurement techniques discussions |v 288 |y 2017 |x 1867-8610 |
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| 913 | 1 | _ | |a DE-HGF |l Atmosphäre und Klima |1 G:(DE-HGF)POF3-240 |0 G:(DE-HGF)POF3-243 |2 G:(DE-HGF)POF3-200 |v Tropospheric trace substances and their transformation processes |x 0 |4 G:(DE-HGF)POF |3 G:(DE-HGF)POF3 |b Erde und Umwelt |
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