Agrios, Konstantinos; Salazar Quintero, Gary Abdiel; Szidat, Sönke (2017). A Continuous-Flow Gas Interface of a Thermal/Optical Analyzer with 14C AMS for Source Apportionment of Atmospheric Aerosols. Radiocarbon, 59(03), pp. 921-932. Arizona Board of Regents, University of Arizona 10.1017/RDC.2016.88
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Agrios_Continuous-flow anaylsis with Sunset-AMS (RC 2017).pdf - Published Version Restricted to registered users only Available under License Publisher holds Copyright. Download (438kB) |
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Agrios et al 2017_A continuous-flow gas interface of a thermaloptical analyzer with 14C AMS for source apportionment of atmospheric aerosols.pdf - Accepted Version Available under License Publisher holds Copyright. Download (932kB) | Preview |
This article reports on the performance of a continuous-flow interface for CO2 gas feeding into the ion source of a 200-kV accelerator mass spectrometer (AMS) in splitless mode. Distinct CO2 fractions and subfractions produced by a commercial Sunset OC/EC (organic carbon/elemental carbon) analyzer from ambient atmospheric aerosols filters are injected into the source and then analyzed by their 14C/12C ratio in real time. New features are revealed from organic aerosol subfractions, which thermally desorb close to each other and are only visible by real-time analysis. An optimized setup for this purpose is presented for the measurement of CO2 amounts from 3 to 45μg C. Efficiencies of 4.5–8.0% for the formation of C- ions from CO2 are obtained for sample masses of 5–10 μg C and carbon mass flow rates below 2 μg min–1. However, this ionization efficiency is substantially suppressed at high carbon mass flow rates. The potential of this method for a refined apportionment of aerosol sources is demonstrated with ambient filter samples.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
08 Faculty of Science > Department of Chemistry, Biochemistry and Pharmaceutical Sciences (DCBP) 10 Strategic Research Centers > Oeschger Centre for Climate Change Research (OCCR) |
UniBE Contributor: |
Agrios, Konstantinos, Salazar Quintero, Gary Abdiel, Szidat, Sönke |
Subjects: |
500 Science > 540 Chemistry |
ISSN: |
0033-8222 |
Publisher: |
Arizona Board of Regents, University of Arizona |
Language: |
English |
Submitter: |
Sönke Szidat |
Date Deposited: |
08 Aug 2017 09:53 |
Last Modified: |
05 Dec 2022 15:06 |
Publisher DOI: |
10.1017/RDC.2016.88 |
BORIS DOI: |
10.7892/boris.101381 |
URI: |
https://boris.unibe.ch/id/eprint/101381 |
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