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Brazilian AMS Radiocarbon Laboratory (LAC-UFF) and intercomparison of preliminary results with Sample Preparation Laboratory (LAPA14C – UFBA)

Published online by Cambridge University Press:  27 January 2025

Tárcio Henrique Ribeiro dos Santos ,
Maria do Rosário Zucchi Open the ORCID record for Maria do Rosário Zucchi [Opens in a new window] ,
Alexandre Barreto Costa ,
Fabiana Monteiro de Oliveira Open the ORCID record for Fabiana Monteiro de Oliveira [Opens in a new window] ,
Kita Chaves Damasio Macario Open the ORCID record for Kita Chaves Damasio Macario [Opens in a new window] ,
José Marques Lopes ,
Naiana Dias dos Santos ,
Antonio Expedito Gomes de Azevedo ,
Adriana Barioni  and
Doriedson Ferreira Gomes
Tárcio Henrique Ribeiro dos Santos
Affiliation:
Instituto Federal de Educação, Ciência e Tecnologia da Bahia – IFBA, 45400-000, Campus Valença, Brazil
Maria do Rosário Zucchi*
Affiliation:
Departamento de Física da Terra e do Meio Ambiente, Instituto de Física, Universidade Federal da Bahia – UFBA, 40.170-115, Salvador, Brazil Programa de Pós-Graduação em Geoquímica: Petróleo e Meio Ambiente (POSPETRO), Universidade Federal da Bahia – UFBA, 40.170-110, Salvador, Brazil
Alexandre Barreto Costa
Affiliation:
Departamento de Física da Terra e do Meio Ambiente, Instituto de Física, Universidade Federal da Bahia – UFBA, 40.170-115, Salvador, Brazil Programa de Pós-Graduação em Geoquímica: Petróleo e Meio Ambiente (POSPETRO), Universidade Federal da Bahia – UFBA, 40.170-110, Salvador, Brazil
Fabiana Monteiro de Oliveira
Affiliation:
LAC-UFF, Laboratório de Radiocarbono, Universidade Federal Fluminense, Av. Gal. Milton Tavares de Souza, s/n, Niterói, RJ, 24210-346, Brazil Programa de Pós-graduação em Química, Universidade Federal Fluminense – UFF, Niterói, RJ, 24020-141, Brazil
Kita Chaves Damasio Macario
Affiliation:
LAC-UFF, Laboratório de Radiocarbono, Universidade Federal Fluminense, Av. Gal. Milton Tavares de Souza, s/n, Niterói, RJ, 24210-346, Brazil Programa de Pós-Graduação em Geociências (Goquímica), Instituto de Química, Universidade Federal Fluminense – UFF, Niterói, RJ, 24020-141, Brazil
José Marques Lopes
Affiliation:
Departamento de Física da Terra e do Meio Ambiente, Instituto de Física, Universidade Federal da Bahia – UFBA, 40.170-115, Salvador, Brazil Programa de Pós-Graduação em Geoquímica: Petróleo e Meio Ambiente (POSPETRO), Universidade Federal da Bahia – UFBA, 40.170-110, Salvador, Brazil
Naiana Dias dos Santos
Affiliation:
Programa de Pós-Graduação em Geoquímica: Petróleo e Meio Ambiente (POSPETRO), Universidade Federal da Bahia – UFBA, 40.170-110, Salvador, Brazil
Antonio Expedito Gomes de Azevedo
Affiliation:
Departamento de Física da Terra e do Meio Ambiente, Instituto de Física, Universidade Federal da Bahia – UFBA, 40.170-115, Salvador, Brazil
Adriana Barioni
Affiliation:
Departamento de Ciências do Mar, Universidade Federal de São Paulo – UNIFESP, 11015-020, Santos, Brazil
Doriedson Ferreira Gomes
Affiliation:
Instituto de Biologia, Laboratório de Paleoecologia (EcoPaleo), Universidade Federal da Bahia – UFBA, 40170-115, Brazil
*
Corresponding author: Maria do Rosário Zucchi; Email: mrzucchi@ufba.br
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Abstract

This study presents the initial results of carbon-14 dating after performing sample preparation and graphite production processes at the Federal University of Bahia (UFBA) in an intercomparison with the same processes performed at the Radiocarbon Laboratory of the Fluminense Federal University (LAC-UFF). Both laboratories are located in Brazil. The accelerator mass spectrometry (AMS) system at LAC-UFF was used for radiocarbon measurements. To verify any possible contamination sources during sample preparation, we initially performed swipe tests at UFBA, which were subsequently processed and the graphite samples were produced at LAC-UFF. After UFBA, several reference materials (IAEA-C1, -C2, -C6, -C9, and OXII standards) were prepared and converted into graphite. In addition, the sample material was first partially prepared at UFF and UFBA and then analyzed with the AMS system at LAC-UFF. Subsamples were prepared for additional measurements of the δ13C composition with an elemental analyzer coupled to an isotope ratio mass spectrometer (EA–IRMS) in LFNA-UFBA to study the isotopic fractionation and yield of the graphitization reaction. The obtained values closely aligned with the reference values, demonstrating reproducibility and quality and indicating minimal contamination during chemical and graphitization processes. In the future, samples from different matrices will be prepared at UFBA for application in paleoenvironmental and archaeological studies.

Keywords

accelerator mass spectrometrycarbon isotopeslaboratory intercomparisonLatin American radiocarbon network
Type
Conference Paper
Information
Radiocarbon , First View , pp. 1 - 9
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Copyright
© The Author(s), 2025. Published by Cambridge University Press on behalf of University of Arizona

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Footnotes

Selected Papers from the 2nd Latin American Radiocarbon Conference, Mexico City, 4–8 Sept. 2023

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