TITLE

Determination of Sr in Portuguese foodstuffs

AUTHOR(S)
Lopes, I.; Madruga, M. J.; Mourato, A.; Abrantes, J.; Reis, M.
PUB. DATE
November 2010
SOURCE
Journal of Radioanalytical & Nuclear Chemistry;Nov2010, Vol. 286 Issue 2, p335
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The Nuclear and Technological Institute (ITN) has the legal responsibility to carry out the environmental radiological monitoring at a national level. This survey was planned to provide relevant information on radioactivity levels in different components of the ecosystem. In what concerns the terrestrial environment the evaluation of the Sr activity concentrations in foodstuffs has been performed using a method based on the separation of Sr by extraction chromatography and beta determination by liquid scintillation counting (LSC) technique. The trials were carried out using 7 g of ash samples and 3 g of commercial Sr-resin (Eichrom). Validation trials were also performed using Sr spiked samples. The chemical yields were determined by gravimetric method, after the addition of stable strontium to the foodstuffs. The Sr activity concentrations in complete meals, meat and vegetables were determined after Y ingrowths in the region 12-862 keV, using the Tri-Carb 3170 TR/SL scintillation counter in normal mode and a counting time of 120 min. The results obtained were low and of the same order of magnitude of those reported by other European countries.
ACCESSION #
55018223

 

Related Articles

  • Standardization of calibration procedures for quantification of gross alpha and gross beta activities using liquid scintillation counter. Bhade, S. P. D.; Reddy, P. J.; Narayanan, A.; Narayan, K. K.; Babu, D. A. R.; Sharma, D. N. // Journal of Radioanalytical & Nuclear Chemistry;May2010, Vol. 284 Issue 2, p367 

    Simultaneous measurement of gross alpha and gross beta activities by liquid scintillation counting technique using LKB Wallac Quantulus 1220 liquid scintillation counter (LSC) equipped with Pulse Shape Analyzer (PSA) is described. Three sets of pure alpha and pure beta standards simulating the...

  • Characterization of Liquid Scintillation Detector (BC-501A) and Digital Pulse Shape Discrimination (DPSD) System. Lombigit, L.; Yussup, N.; Ibrahim, Maslina Mohd; Abd Rahman, Nur Aira; Rawi M. Z., M. // AIP Conference Proceedings;2015, Vol. 1659 Issue 1, p1 

    A digital n/γ pulse shape discrimination (PSD) system is currently under development at Instrumentation & Automation Centre, Malaysian Nuclear Agency. This system aims at simultaneous detection of fast neutron and gamma ray in mixed radiations environment. This work reports the system...

  • Determination of Sr in soil, grass and cereals. Landstetter, Claudia; Ringer, Wolfgang; Achatz, Arno; Katzlberger, Christian // Journal of Radioanalytical & Nuclear Chemistry;Nov2010, Vol. 286 Issue 2, p435 

    Sr was measured in environmental samples in Upper Austria in the year 2005. After the nuclear weapon tests the average deposition of Sr in Austria amounted to 3.3 kBq/m². In 1986 the average deposition was 0.9 kBq/m² []. To assess the actual condition in soil, grass and cereals Sr was...

  • Measuring alpha and beta activity of filter and swab samples with LSC. Sas, D.; Sládek, P.; Janda, J. // Journal of Radioanalytical & Nuclear Chemistry;Nov2010, Vol. 286 Issue 2, p513 

    nalysis of alpha and beta emitters in aerosol filters and swabs of different materials by liquid scintillation counter is discussed. This method appears suitable for fast determination of activity of radionuclides due to direct alpha and beta separation, measurement in 4Ï€ geometry and...

  • Application of ultra-low level liquid scintillation to the determination of 222Rn in groundwater. Gal´n López, M.; Martín Sánchez, A.; Gómez Escobar, V. // Journal of Radioanalytical & Nuclear Chemistry;Sep2004, Vol. 261 Issue 3, p631 

    A procedure for the determination of 222Rn in environmental water samples using liquid scintillation counting (LSC) was applied. The extractive scintillator RADONSÒ and an ultra-low background 1220 QuantulusÔ were used. A minimum detectable activity of 0.1 Bq.l-1 in 20 ml was found with...

  • Peak asymmetry understanding in α liquid scintillation with β/γ rejection. Auplais, Jean; Dacheux, Nicolas // AIP Conference Proceedings;2000, Vol. 532 Issue 1, p312 

    The alpha liquid scintillation with β/γ discrimination is an analytical method of interest for the determination of α emitters at the trace level. Several authors already suggested its utilization for the detection of radioactivity in environmental samples due to its high sensitivity...

  • Sequential determination of actinide isotopes and radiostrontium in swipe samples. Dai, Xiongxin; Kramer-Tremblay, Sheila // Journal of Radioanalytical & Nuclear Chemistry;Aug2011, Vol. 289 Issue 2, p461 

    ys of alpha- and beta-emitting radionuclides in swipe samples are often required to monitor the presence of removable surface contamination for radiological protection and control in nuclear facilities. Swipe analysis has also proven to be a very sensitive analytical technique to detect nuclear...

  • Neutron/Gamma-Ray Pulse Shape Discrimination with Liquid Scintillation Detectors Based on Average Pulses. Ambers, Scott D.; Flaska, Marek; Pozzi, Sara A. // Journal of the Institute of Nuclear Materials Management;Fall2009, Vol. 38 Issue 1, p48 

    In this paper, we present a new pulse shape discrimination (PSD) method that is based on detailed knowledge of the average detector response to radiation. Traditionally, PSD has been performed using standard methods such as charge integration. In this work, average pulses were obtained for...

  • Liquid scintillation counter.  // BioScience;Feb1987, Vol. 37 Issue 2, p132 

    Reviews the benchtop Beckman LS 1701 liquid scintillation counter. Features, including three independently programmable user files and preset isotope settings; Automatic isotope endpoint determination; Isotope library for storing calibration curves; Optional Beckman Data Capture software package.

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics