Results of an IAEA inter-comparison exercise to assess 137Cs and total 210Pb analytical performance in soil

Shakhashiro, A.; Mabit, Lionel

doi:10.1016/j.apradiso.2008.07.014

Cited by 69 publications

(26 citation statements)

References 11 publications

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“…The counting time for each sample was set at 80 000 s to reach an acceptable level of detection limit and to reach a measurement error under 10 % at 2σ precision. Calibration of equipment, analysis and quality control of the measurements were performed following IAEA standard procedure (Shakhashiro and Mabit, 2009).…”

Section: Cs Analysis and Estimation Of Soil Erosion Ratesmentioning

confidence: 99%

Combined use of stable isotopes and fallout radionuclides as soil erosion indicators in a forested mountain site, South Korea

et al. 2013

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Abstract. The aim of this study is to assess and to validate the suitability of the stable nitrogen and carbon isotope signature as soil erosion indicators in a mountain forest site in South Korea. Our approach is based on the comparison of the isotope signature of "stable" landscape positions (reference sites), which are neither affected by erosion nor deposition, with eroding sites. For undisturbed soils we expect that the enrichment of δ15N and δ13C with soil depth, due to fractionation during decomposition, goes in parallel with a decrease in nitrogen and carbon content. Soil erosion processes potentially weaken this correlation. The 137Cs method and the Revised Universal Soil Loss Equation (RUSLE) were applied for the soil erosion quantification. Erosion rates obtained with the 137Cs method range from 0.9 t ha−1 yr−1 to 7 t ha−1 yr−1. Considering the steep slopes of up to 40° and the erosive monsoon events (R factor of 6600 MJ mm ha−1 h−1 yr –1), the rates are plausible and within the magnitude of the RUSLE-modeled soil erosion rates, varying from 0.02 t ha−1 yr−1 to 5.1 t ha−1 yr−1. The soil profiles of the reference sites showed significant (p < 0.0001) correlations between nitrogen and carbon content and its corresponding δ15N and δ13C signatures. In contrast, for the eroding sites this relationship was weaker and for the carbon not significant. These results confirm the usefulness of the stable carbon isotope signature as a qualitative indicator for soil disturbance. We could show further that the δ15N isotope signature can be used similarly for uncultivated sites. We thus propose that the stable δ15N and δ13C signature of soil profiles could serve as additional indicators confirming the accurate choice of the reference site in soil erosion studies using the 137Cs method.

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Section: Cs Analysis and Estimation Of Soil Erosion Ratesmentioning

confidence: 99%

Combined use of stable isotopes and fallout radionuclides as soil erosion indicators in a forested mountain site, South Korea

et al. 2013

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“…These PTs evaluate the validity and reliability of the analytical results. Through the provision of reference materials, control and performance assessment by the organization of proficiency tests and inter-comparison exercises, IAEA has been assisting laboratories in testing, improving and maintaining the reliability and quality of analyses of radioactive material [2]. The data presented are the results submitted for the IAEA-TEL-2011-03 world-wide open proficiency test on spiked water and soil samples.…”

Section: Methodsmentioning

confidence: 99%

“…In the frame of accreditation systems, the use of reference materials, both for quality control and proficiency testing, has therefore increased in recent years [1]. In addition, proficiency testing that includes distribution of homogenous portions of the test material for analysis as an unknown is a method for assessing and documenting the reliability and accuracy of the analytical data produced [2]. This paper presents the results obtained by the laboratory in an intercomparison exercise organized by IAEA in 2011, the first year when the laboratory has participated in such proficiency test.…”

Section: Introductionmentioning

confidence: 99%

Proficiency test: a quality assurance method for high-purity gamma spectrometry system

Rădulescu

Calin

2014

EPJ Web of Conferences

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Abstract. As part of the implementation of the quality system on ISO 17025 and accreditation, SALROM laboratory participated in the last year in intercomparison exercises, national and international, for determination of natural and man-made radionuclides. This paper describes results obtained in intercomparison exercise organized by IAEA in 2011. The reported values were mostly in good agreement with the resulting reference values.

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“…Samples were digested based on USTUR sample preparation methodology. In order to assess the analytical performances of the methodology, two statistical parameters suggested by Shakhashiro and Mabit [19] were determined to evaluate laboratory performances and their scoring: relative bias and U test values.…”

Section: Analytical Performancesmentioning

confidence: 99%

Detection of beryllium in digested autopsy tissues by inductively coupled plasma mass spectrometry using a high matrix interface configuration

et al. 2012

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This article describes a robust methodology using the combination of instrumental design (high matrix interface-HMI), sample dilution and internal standardization for the quantification of beryllium (Be) in various digested autopsy tissues using inductively coupled plasma mass spectrometry. The applicability of rhodium as a proper internal standard for Be was demonstrated in three types of biological matrices (i.e., femur, hair, lung tissues). Using HMI, it was possible to achieve instrumental detection limits and sensitivity of 0.6 ng L(-1) and 157 cps L ng(-1), respectively. Resilience to high salt matrices of the HMI setup was also highlighted using bone mimicking solution ([Ca(2+)] = 26 to 1,400 mg L(-1)), providing a 14-fold increase in tolerance and a 2.7-fold decrease in method detection limit compared to optimized experimental conditions obtained without the HMI configuration. Precision of the methodology to detect low levels of Be in autopsy samples was demonstrated using hair and blood certified reference materials. Be concentration ranging from 0.015 to 255 μg kg(-1) in autopsy samples obtained from the U.S. Transuranium and Uranium Registries were measured using the methodology presented.

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Results of an IAEA inter-comparison exercise to assess 137Cs and total 210Pb analytical performance in soil

Cited by 69 publications

References 11 publications

Combined use of stable isotopes and fallout radionuclides as soil erosion indicators in a forested mountain site, South Korea

Combined use of stable isotopes and fallout radionuclides as soil erosion indicators in a forested mountain site, South Korea

Proficiency test: a quality assurance method for high-purity gamma spectrometry system

Detection of beryllium in digested autopsy tissues by inductively coupled plasma mass spectrometry using a high matrix interface configuration

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