Brazilian AMS Radiocarbon Laboratory (LAC-UFF) and intercomparison of preliminary results with Sample Preparation Laboratory (Lapa 14 C – Ufba)

Bibliographic Data

ID9241705
AuthorsTárcio Henrique Ribeiro dos Santos, Maria do Rosário Zucchi (0000-0002-1721-6866), Alexandre Barreto Costa (0000-0003-3406-8444), Fabiana Oliveira (0000-0003-3118-1820), Kita Macario (0000-0002-0581-9854), José Marques Lopes, Naiana Dias dos Santos (0000-0001-8281-6414), Antonio Expedito Gomes de Azevedo, Adriana Barioni, Doriedson Ferreira Gomes (0000-0002-1569-8101)
Year2025
Volume68
Issue1
Pages1-9
Publication date2025-01-27
Open AccessYes
TypeARTICLE
VenueRadiocarbon (JOURNAL)
Journal identifiersISSN: 0033-8222 • E-ISSN: 1945-5755
PublisherCambridge University Press (CUP) (PUBLISHER)
DOI10.1017/rdc.2024.104
OpenAlexW4406878179
LanguageEN
Citations received1
References cited32

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 δ 13 C 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

Geochemistry · Radiocarbon dating · Radiochemistry · Archaeology and ancient environmental studies · Chemistry · Isotope Analysis in Ecology · Radioactivity and Radon Measurements · Geology · Paleontology