Hostname: page-component-586b7cd67f-l7hp2 Total loading time: 0 Render date: 2024-11-25T23:15:45.688Z Has data issue: false hasContentIssue false
  • English
  • Français

Optimization of the Amount of Zinc in the Graphitization Reaction for Radiocarbon AMS Measurements at LAC-UFF

Published online by Cambridge University Press:  26 July 2016

Kita D Macario Open the ORCID record for Kita D Macario [Opens in a new window] ,
Fabiana M Oliveira ,
Vinicius N Moreira ,
Eduardo Q Alves ,
Carla Carvalho ,
Renata M Jou ,
Maria Isabela Oliveira ,
Bruna B Pereira ,
Izabela Hammerschlag  and
Bruna Netto
...Show all authors
Kita D Macario*
Affiliation:
Laboratório de Radiocarbono, Instituto de Física, Universidade Federal Fluminense, Av. Gal. Milton Tavares de Souza, s/n, Niterói, 24210-346, RJ, Brazil
Fabiana M Oliveira
Affiliation:
Laboratório de Radiocarbono, Instituto de Física, Universidade Federal Fluminense, Av. Gal. Milton Tavares de Souza, s/n, Niterói, 24210-346, RJ, Brazil
Vinicius N 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 Accelerator Unit, University of Oxford, Dyson Perrins Building, South Parks Road, Oxford, OX1 3QY, United Kingdom
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
Renata M Jou
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
Bruna B Pereira
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 Netto
Affiliation:
Laboratório de Radiocarbono, Instituto de Física, Universidade Federal Fluminense, Av. Gal. Milton Tavares de Souza, s/n, Niterói, 24210-346, RJ, Brazil
Amanda P Seixas
Affiliation:
Laboratório de Radiocarbono, Instituto de Física, Universidade Federal Fluminense, Av. Gal. Milton Tavares de Souza, s/n, Niterói, 24210-346, RJ, Brazil
João Vitor P Malafaia
Affiliation:
Laboratório de Radiocarbono, Instituto de Física, Universidade Federal Fluminense, Av. Gal. Milton Tavares de Souza, s/n, Niterói, 24210-346, RJ, Brazil
Lara Moreira
Affiliation:
Laboratório de Radiocarbono, Instituto de Física, Universidade Federal Fluminense, Av. Gal. Milton Tavares de Souza, s/n, Niterói, 24210-346, RJ, Brazil
Luana Cunha
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
Pedro Mallet
Affiliation:
Laboratório de Radiocarbono, Instituto de Física, Universidade Federal Fluminense, Av. Gal. Milton Tavares de Souza, s/n, Niterói, 24210-346, RJ, Brazil
Loise Lima
Affiliation:
Laboratório de Radiocarbono, Instituto de Física, Universidade Federal Fluminense, Av. Gal. Milton Tavares de Souza, s/n, Niterói, 24210-346, RJ, Brazil
Fabio Lopes
Affiliation:
Laboratório de Radiocarbono, Instituto de Física, Universidade Federal Fluminense, Av. Gal. Milton Tavares de Souza, s/n, Niterói, 24210-346, RJ, Brazil Laboratório de Física Nuclear Aplicada, Departamento de Física, Universidade Estadual de Londrina, Rodovia Celso Garcia Cid, 445 km 380, Londrina, 86057-970, PR, Brazil
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, Quinta de los Molinos, Ave. Salvador Allende y Luaces, Plaza de la Revolución, Havana, Cuba
Ingrid S Chanca
Affiliation:
Laboratório de Radiocarbono, Instituto de Física, Universidade Federal Fluminense, Av. Gal. Milton Tavares de Souza, s/n, Niterói, 24210-346, RJ, Brazil
Paulo R S Gomes
Affiliation:
Laboratório de Radiocarbono, Instituto de Física, Universidade Federal Fluminense, Av. Gal. Milton Tavares de Souza, s/n, Niterói, 24210-346, RJ, Brazil
*
*Corresponding author. Email: [email protected].
Get access Rights & Permissions [Opens in a new window]

Abstract

The Radiocarbon Laboratory of the Universidade Federal Fluminense, in Brazil, has been successfully applying the zinc reduction method for graphitization of carbon samples since the development of its early protocols in 2009. Successive methodological research aiming to improve and, ultimately, optimize the precision and accuracy of our results indicates that graphitization temperatures as low as 460°C promote erratic 13C isotopic fractionation, but an approximately constant fractionation of about –5‰ is achieved at 520°C. In this work, we present isotope ratio mass spectrometry (IRMS) δ13C results for 14C reference materials graphitized at 550°C with variable amounts of zinc. Based on the results obtained from the addition of 20, 35, and 50 mg of zinc, we conclude that a slightly lower variation in 13C isotope fractionation during graphitization is obtained with less zinc. Moreover, the average isotopic fractionation is not altered by increasing the graphitization temperature from 520°C to 550°C.

Keywords

isotopic fractionationgraphitizationzinc reductionIRMSradiocarbon AMS
Type
Advances in Physical Measurement Techniques
Information
Radiocarbon , Volume 59 , Special Issue 3: Proceedings of the 22nd International Radiocarbon Conference (Part 2 of 2) , June 2017 , pp. 885 - 891
Copyright
© 2016 by the Arizona Board of Regents on behalf of the University of Arizona 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Footnotes

Selected Papers from the 2015 Radiocarbon Conference, Dakar, Senegal, 16–20 November 2015

References

REFERENCES

Anjos, RM, Macario, KD, Gomes, PRS, Linares, R, Queiroz, E, Carvalho, C. 2013. Towards a complete 14C AMS facility at the Universidade Federal Fluminense (Niterói, Brazil): sample preparation laboratory tests. Nuclear Instruments and Methods in Physics Research B 294:173–175.Google Scholar
Jou, RM, Macario, KD, Carvalho, C, Dias, RS, Brum, MC, Cunha, FR, Ferreira, CG, Chanca, IS. 2015. Biogenic fraction in the synthesis of polyethylene terephthalate. International Journal of Mass Spectrometry 388:65–68.Google Scholar
Kim, SH, Kelly, PB, Clifford, AJ. 2008. Biological/biomedical accelerator mass spectrometry targets. 1. optimizing the CO2 reduction step using zinc dust. Analytical Chemistry 80(20):7651–7660.Google Scholar
Kim, SH, Kelly, PB, Clifford, AJ. 2009. Accelerator mass spectrometry targets of submilligram carbonaceous samples using the high-throughput Zn reduction method. Analytical Chemistry 81(14):5949–5954.Google Scholar
Linares, R, Macario, KD, Santos, GM, Carvalho, C, dos Santos, HC, Gomes, PR, Castro, MD, Oliveira, FM, Alves, EQ. 2015. Radiocarbon measurements at LAC-UFF: recent performance. Nuclear Instruments and Methods in Physics Research B 361:341–345.Google Scholar
Macario, KD, Gomes, PR, Anjos, RM, Carvalho, C, Linares, R, Alves, EQ, Oliveira, FM, Castro, MD, Chanca, IS, Silveira, MF, Pessenda, LC. 2013. The Brazilian AMS Radiocarbon Laboratory (LAC-UFF) and the intercomparison of results with CENA and UGAMS. Radiocarbon 55(2–3):325–330.Google Scholar
Macario, KD, Oliveira, FM, Carvalho, C, Santos, GM, Xu, X, Chanca, IS, Alves, EQ, Jou, RM, Oliveira, MI, Pereira, BB, Moreira, V. 2015. Advances in the graphitization protocol at the Radiocarbon Laboratory of the Universidade Federal Fluminense (LAC-UFF) in Brazil. Nuclear Instruments and Methods in Physics Research B 361:402–405.Google Scholar
Mann, WB. 1983. An international reference material for radiocarbon dating. Radiocarbon 25(2):519–527.CrossRefGoogle Scholar
Marzaioli, F, Borriello, G, Passariello, I, Lubritto, C, Cesare, ND, D’Onofrio, A, Terrasi, F. 2008. Zinc reduction as an alternative method for AMS radiocarbon dating: process optimization at CIRCE. Radiocarbon 50(1):139–149.Google Scholar
McNichol, AP, Gagnon, AR, Jones, GA, Osborne, EA. 1992. Illumination of a black box: analysis of gas composition during graphite target preparation. Radiocarbon 34(3):321–329.Google Scholar
Oliveira, FM, Araujo, CA, Macario, KD, Cid, AS. 2015. Radiocarbon analysis of the Torah scrolls from the National Museum of Brazil collection. Nuclear Instruments and Methods in Physics Research B 361:531–534.Google Scholar
Oliveira, FM, Macario, KD, Pereira, BB, Buarque, A, Chivall, D, Alves, QA, Bronk Ramsey, C. 2016. Evaluation of sample preparation protocols for the radiocarbon dating of Tupiguarani pottery in Southeastern Brazil. Radiocarbon. This issue. DOI:10.1017/RDC.2016.58.Google Scholar
Rinyu, L, Molnár, M, Major, I, Nagy, T, Veres, M, Kimák, Á, Wacker, L, Synal, H-A. 2013. Optimization of sealed tube graphitization method for environmental C-14 studies using MICADAS. Nuclear Instruments and Methods in Physics Research B 294:270–275.Google Scholar
Rozanski, K. 1991. Consultants’ group meeting on 14C reference materials for radiocarbon laboratories. February 18–20, Vienna, Austria. Internal Report. Vienna: IAEA.Google Scholar
Rozanski, K, Stichler, W, Gonfiantini, R, Scott, EM, Beukens, RP, Kromer, B, van der Plicht, J. 1992. The IAEA 14C Intercomparison Exercise 1990. Radiocarbon 34(3):506–519.Google Scholar
Vogel, JS. 1992. Rapid production of graphite without contamination for biomedical AMS. Radiocarbon 34(3):344–350.Google Scholar
Xu, X, Trumbore, SE, Zheng, S, Southon, JR, McDuffee, KE, Luttgen, M, Liu, JC. 2007. Modifying a sealed tube zinc reduction method for preparation of AMS graphite targets: reducing background and attaining high precision. Nuclear Instruments and Methods in Physics Research B 259(1):320–329.Google Scholar