A fast method for the determination of 210Pb by LSC in liquid samples

Authors

  • Camilla da Silva Sampaio Lucena Instituto de Radioproteção e Dosimetria
  • Wanderson de Oliveira Sousa Instituto de Radioproteção e Dosimetria
  • Bernardo Maranhão Dantas Instituto de Radioproteção e Dosimetria

DOI:

https://doi.org/10.15392/bjrs.v7i3.821

Keywords:

210Pb, liquid scintillation, in vitro bioassay

Abstract

210Pb is a naturally occurring radionuclide, widely distributed on the earth´s surface and can be incorporated by humans through food chain or directly by ingestion or inhalation in situations of occupational or accidental exposures. It concentrates in bone tissue when absorbed, presenting a rather long biological half-life and producing one of the highest skeletal doses among naturally occurring radionuclides under conditions of average background exposure. Because of its metabolic and dosimetric characteristics, 210Pb becomes an important isotope from the radiation protection point of view. This work presents the development of a methodology for the determination of 210Pb by liquid scintillation. It is the modification of a sequential analysis for naturally occurring radionuclides in environmental samples without the need of waiting for secular equilibrium to be achieved with 210Bi. The methodology has shown to be precise, stable and provides consistent results when evaluated according to the criteria established in the Brazilian Intercomparison Program promoted by the IRD.

Downloads

Download data is not yet available.

References

LAURIA, D. C.; CARVALHO, L. L.; CONTI, C. C. Comparison of different methods for 210Pb determination in environmental samples. Advances in Liquid Scintillation Spectrometry LSC 2005, p. 211-216, 2006.

SAN MIGUEL, E. G.; PÉREZ-MORENO, J. P.; BOLÍVAR, J. P.; GARCÍA-TENORIO, R.; MARTIN, J. E. 210Pb determination by gamma spectrometry in voluminal samples (cylindrical geometry). Nuclear Instruments and Methods in Physics Research Section A, v. 493 (1-2), p. 111-120, 2002.

GARCÍA-ORELLANA, I.; GARCÍA-LEÓN, M. An easy method to determine 210Po and 210Pb by alpha spectrometry in marine environmental samples. Applied Radiation and Isotopes, v. 56 (4), p; 633-636, 2002.

GODOY, J. M.; MOREIRA, I.; WANDERLEY, C.; SIMÕES FILHO, F. F., MOZETO, A. A. An alternative method for the determination of excess 210Pb in sediments. Radiation Protection Dosimetry, v. 75 (1-4), p. 111-115, 1998.

BLANCO, P.; LOZANO, J. C.; GÓMEZ ESCOBAR, V.; VERA TOMÉ, F. A simple method for 210Pb determination in geological samples by liquid scintillation counting. Applied Radiation and Isotopes, v. 60, p. 83-88, 2004.

VILLA, M.; HURTADO, S.; MANJÓN, G.; GARCÍA-TENORIO, R. Calibration and measurement of 210Pb using two independent techniques. Radiation Measurements, v. 42, p. 1552-1560, 2007.

KIM, Y. -J.; KIM, C. -K.; LEE, J. -I. Simultaneous determination of 226Ra and 210Pb in groundwater and soil samples by using liquid scintillation counter – suspension gel method. Applied Radiation and Isotopes, v. 54, p. 275-281, 2001.

ISO – International Organization for Standardization. Determination of the characteristic limits (decision threshold, detection limit and limits of the confidence interval) for measurements of ionizing radiation – Fundamentals and application. ISO 11929:2010, Geneva, 2010. 60p.

Downloads

Published

2019-07-04

How to Cite

Lucena, C. da S. S., Sousa, W. de O., & Dantas, B. M. (2019). A fast method for the determination of 210Pb by LSC in liquid samples. Brazilian Journal of Radiation Sciences, 7(3). https://doi.org/10.15392/bjrs.v7i3.821

Issue

Section

Articles

Most read articles by the same author(s)

1 2 > >>