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LAC-UFF STATUS REPORT: CURRENT PROTOCOLS AND RECENT DEVELOPMENTS

Published online by Cambridge University Press:  29 January 2021

Fabiana Oliveira Open the ORCID record for Fabiana Oliveira [Opens in a new window] ,
Kita Macario Open the ORCID record for Kita Macario [Opens in a new window] ,
Carla Carvalho Open the ORCID record for Carla Carvalho [Opens in a new window] ,
Vinicius Moreira ,
Eduardo Q Alves ,
Ingrid Chanca ,
Maikel Diaz Open the ORCID record for Maikel Diaz [Opens in a new window] ,
Renata Jou ,
Izabela Hammerschlag  and
Bruna M Netto
...Show all authors
Fabiana Oliveira*
Affiliation:
Laboratório de Radiocarbono, Instituto de Física, Universidade Federal Fluminense, Av. Gal. Milton Tavares de Souza s/n, Niterói, 24210-346, RJ, Brazil Departamento de Físico-Química, Universidade Federal Fluminense, Outeiro São João Batista, s/n, Niterói, 24001-970, Rio de Janeiro, Brazil
Kita Macario
Affiliation:
Laboratório de Radiocarbono, Instituto de Física, Universidade Federal Fluminense, Av. Gal. Milton Tavares de Souza s/n, Niterói, 24210-346, RJ, Brazil
Carla Carvalho
Affiliation:
Laboratório de Radiocarbono, Instituto de Física, Universidade Federal Fluminense, Av. Gal. Milton Tavares de Souza s/n, Niterói, 24210-346, RJ, Brazil Departamento de Geoquímica, Universidade Federal Fluminense, Outeiro São João Batista s/n, Niterói, 24001-970, RJ, Brazil
Vinicius Moreira
Affiliation:
Laboratório de Radiocarbono, Instituto de Física, Universidade Federal Fluminense, Av. Gal. Milton Tavares de Souza s/n, Niterói, 24210-346, RJ, Brazil
Eduardo Q Alves
Affiliation:
Laboratório de Radiocarbono, Instituto de Física, Universidade Federal Fluminense, Av. Gal. Milton Tavares de Souza s/n, Niterói, 24210-346, RJ, Brazil Oxford Radiocarbon Unit (ORAU), Dyson Perrins Building, South Parks Road, OxfordOX1 3QY, United Kingdom
Ingrid Chanca
Affiliation:
Laboratório de Radiocarbono, Instituto de Física, Universidade Federal Fluminense, Av. Gal. Milton Tavares de Souza s/n, Niterói, 24210-346, RJ, Brazil Max Planck Institut for Biogeochemistry, Hans-Knoell-Str. 10, Jena, Germany
Maikel Diaz
Affiliation:
Laboratório de Radiocarbono, Instituto de Física, Universidade Federal Fluminense, Av. Gal. Milton Tavares de Souza s/n, Niterói, 24210-346, RJ, Brazil Instituto Superior de Tecnologías y Ciencias Aplicadas, InSTEC, Universidad de la Habana, Quinta de los Molinos, Ave. Salvador Allende y Luaces, Plaza de la Revolución, Havana, CP 10400, Cuba
Renata Jou
Affiliation:
Laboratório de Radiocarbono, Instituto de Física, Universidade Federal Fluminense, Av. Gal. Milton Tavares de Souza s/n, Niterói, 24210-346, RJ, Brazil
Izabela Hammerschlag
Affiliation:
Laboratório de Radiocarbono, Instituto de Física, Universidade Federal Fluminense, Av. Gal. Milton Tavares de Souza s/n, Niterói, 24210-346, RJ, Brazil
Bruna M Netto
Affiliation:
Laboratório de Radiocarbono, Instituto de Física, Universidade Federal Fluminense, Av. Gal. Milton Tavares de Souza s/n, Niterói, 24210-346, RJ, Brazil
Maria Isabela Oliveira
Affiliation:
Laboratório de Radiocarbono, Instituto de Física, Universidade Federal Fluminense, Av. Gal. Milton Tavares de Souza s/n, Niterói, 24210-346, RJ, Brazil
Ayrton Assumpção
Affiliation:
Laboratório de Radiocarbono, Instituto de Física, Universidade Federal Fluminense, Av. Gal. Milton Tavares de Souza s/n, Niterói, 24210-346, RJ, Brazil
Dayanne Fernandes
Affiliation:
Laboratório de Radiocarbono, Instituto de Física, Universidade Federal Fluminense, Av. Gal. Milton Tavares de Souza s/n, Niterói, 24210-346, RJ, Brazil Centro Federal de Educação Tecnológica Celso Suckow da Fonseca, campus Nova Friburgo, Av. Governador Roberto Silveira 1900, Nova Friburgo, RJ, Brazil
*
*Corresponding author. Email: [email protected].
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Abstract

The Radiocarbon Laboratory of the Fluminense Federal University was installed in 2009, and its NEC Single Stage Accelerator Mass Spectrometry system has been operational since 2012. As the first 14C-AMS facility in Latin America, the LAC-UFF became a reference center for radiocarbon (14C) dating in Brazil. Over the years we have implemented pretreatment protocols for several kinds of materials, such as cellulose, soil, bone, and biofuels. In the present paper we describe our current protocols for the preparation of these types of samples. Moreover, after 10 years of operation, with the aim of expanding the range of materials we are able to analyze, we report the results of several tests to improve accuracy, precision and background levels. For example, here we discuss how isotopic fractionation during the graphitization and measurement steps has been controlled. Concerning results interpretation, our research group has been using OxCal chronological models to analyze different contexts such as stromatolite growth, tree rings, soil deposition and marine reservoir effect (MRE) determination.

Keywords

14C-AMSchronological modelssample preparationzinc reduction
Type
Conference Paper
Information
Radiocarbon , Volume 63 , Issue 4: Featuring: CLARa Proceedings of the 1st Latin American Radiocarbon Conference , August 2021 , pp. 1233 - 1245
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Copyright
© The Author(s), 2021. Published by Cambridge University Press for the Arizona Board of Regents on behalf of the University of Arizona

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Footnotes

Selected Papers from the 1st Latin American Radiocarbon Conference, Rio de Janeiro, 29 Jul.–2 Aug. 2019

References

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