AMS-C14 analysis of graphite obtained with an Automated Graphitization Equipment (AGE III) from aerosol collected on quartz filters


Autoria(s): Solis, C.; Chavez, E.; Ortiz, M.E.; Andrade, E.; Ortiz, E.; Szidat, Sönke; Wacker, L.
Data(s)

2015

31/12/1969

Resumo

AMS-14C applications often require the analysis of small samples. Such is the case of atmospheric aerosols where frequently only a small amount of sample is available. The ion beam physics group at the ETH, Zurich, has designed an Automated Graphitization Equipment (AGE III) for routine graphite production for AMS analysis from organic samples of approximately 1 mg. In this study, we explore the potential use of the AGE III for graphitization of particulate carbon collected in quartz filters. In order to test the methodology, samples of reference materials and blanks with different sizes were prepared in the AGE III and the graphite was analyzed in a MICADAS AMS (ETH) system. The graphite samples prepared in the AGE III showed recovery yields higher than 80% and reproducible 14C values for masses ranging from 50 to 300 lg. Also, reproducible radiocarbon values were obtained for aerosol filters of small sizes that had been graphitized in the AGE III. As a study case, the tested methodology was applied to PM10 samples collected in two urban cities in Mexico in order to compare the source apportionment of biomass and fossil fuel combustion. The obtained 14C data showed that carbonaceous aerosols from Mexico City have much lower biogenic signature than the smaller city of Cuernavaca.

Formato

application/pdf

application/pdf

Identificador

http://boris.unibe.ch/74247/1/Solis_AGE%20graphitization%20of%20aerosol%20samples.pdf

http://boris.unibe.ch/74247/7/Solis%20et%20al%202015_AMS-C14%20analysis%20of%20graphite%20from%20aerosol-1.pdf

Solis, C.; Chavez, E.; Ortiz, M.E.; Andrade, E.; Ortiz, E.; Szidat, Sönke; Wacker, L. (2015). AMS-C14 analysis of graphite obtained with an Automated Graphitization Equipment (AGE III) from aerosol collected on quartz filters. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 361, pp. 419-422. Elsevier 10.1016/j.nimb.2015.05.027 <http://dx.doi.org/10.1016/j.nimb.2015.05.027>

doi:10.7892/boris.74247

info:doi:10.1016/j.nimb.2015.05.027

urn:issn:0168-583X

Idioma(s)

eng

Publicador

Elsevier

Relação

http://boris.unibe.ch/74247/

Direitos

info:eu-repo/semantics/restrictedAccess

info:eu-repo/semantics/embargoedAccess

Fonte

Solis, C.; Chavez, E.; Ortiz, M.E.; Andrade, E.; Ortiz, E.; Szidat, Sönke; Wacker, L. (2015). AMS-C14 analysis of graphite obtained with an Automated Graphitization Equipment (AGE III) from aerosol collected on quartz filters. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 361, pp. 419-422. Elsevier 10.1016/j.nimb.2015.05.027 <http://dx.doi.org/10.1016/j.nimb.2015.05.027>

Palavras-Chave #540 Chemistry
Tipo

info:eu-repo/semantics/article

info:eu-repo/semantics/publishedVersion

PeerReviewed