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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Improving sample representativeness in environmental studies: a major component for the uncertainty budget

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Author(s):
De Franca, Elvis J. [1] ; De Nadai Fernandes, Elisabete A. [1] ; Bacchi, Marcio A. [1] ; Bode, Peter [2] ; van Soldt, Rob T. M. [2]
Total Authors: 5
Affiliation:
[1] Univ Sao Paulo, Ctr Energia Nucl Agr, BR-13400970 Piracicaba, SP - Brazil
[2] Delft Univ Technol, Fac Sci Appl, Dept Radiat Radionuclides & Reactors, Reactor Inst Delft, Sect Radiat & Isotopes Hlth, NL-2629 JB Delft - Netherlands
Total Affiliations: 2
Document type: Journal article
Source: Journal of Radioanalytical and Nuclear Chemistry; v. 282, n. 1, p. 125-132, OCT 2009.
Web of Science Citations: 0
Abstract

For environmental quality assessment, INAA has been applied for determining chemical elements in small (200 mg) and large (200 g) samples of leaves from 200 trees. By applying the Ingamells' constant, the expected percent standard deviation was estimated in 0.9-2.2% for 200 mg samples. Otherwise, for composite samples (200 g), expected standard deviation varied from 0.5 to 10% in spite of analytical uncertainties ranging from 2 to 30%. Results thereby suggested the expression of the degree of representativeness as a source of uncertainty, contributing for increasing of the reliability of environmental studies mainly in the case of composite samples. (AU)

FAPESP's process: 03/01075-2 - Tree species native to the Atlantic Rainforest bioaccumulators of chemical elements
Grantee:Elvis Joacir de França
Support type: Scholarships in Brazil - Doctorate (Direct)