Online coupling of pure O2 thermo-optical methods – 14C AMS for source apportionment of carbonaceous aerosols

Agrios, Konstantinos; Salazar, Gary A.; Zhang, Yanlin; Uglietti, Chiara; Battaglia, Michael; Luginbühl, Marc Joel; Ciobanu, Viorela Gabriela; Vonwiller, Matthias; Szidat, Sönke (2015). Online coupling of pure O2 thermo-optical methods – 14C AMS for source apportionment of carbonaceous aerosols. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 361, pp. 288-293. Elsevier 10.1016/j.nimb.2015.06.008

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This paper reports on novel separation methods developed for the direct determination of 14C in organic carbon (OC) and elemental carbon (EC), two sub-fractions of total carbon (TC) of atmospheric air particulate matter. Until recently, separation of OC and EC has been performed off-line by manual and time-consuming techniques that relied on the collection of massive CO2 fractions. We present here two on-line hyphenated techniques between a Sunset OC/EC analyzer and a MICADAS (MIni radioCArbon DAting System) accelerator mass spectrometer (AMS) equipped with a gas ion source. The first implementation facilitates the direct measurement in the low sample size range (<10 lg C) with high throughput on a routine basis, while the second explores the potential for a continuous-flow real-time CO2 gas feed into the ion source. The performance achieved with reference materials and real atmospheric samples will be discussed to draw conclusions on the improvement offered in the field of 14C aerosol source apportionment.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Oeschger Centre for Climate Change Research (OCCR)
08 Faculty of Science > Departement of Chemistry and Biochemistry

Graduate School:

Graduate School of Climate Sciences

UniBE Contributor:

Agrios, Konstantinos; Salazar Quintero, Gary Abdiel; Zhang, Yanlin; Uglietti, Chiara; Battaglia, Michael; Luginbühl, Marc Joel; Vonwiller, Matthias and Szidat, Sönke

Subjects:

500 Science > 540 Chemistry

ISSN:

0168-583X

Publisher:

Elsevier

Language:

English

Submitter:

Monika Wälti-Stampfli

Date Deposited:

02 Dec 2015 08:01

Last Modified:

22 Dec 2020 06:51

Publisher DOI:

10.1016/j.nimb.2015.06.008

BORIS DOI:

10.7892/boris.73279

URI:

https://boris.unibe.ch/id/eprint/73279

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