Please use this identifier to cite or link to this item: http://hdl.handle.net/10198/748
Title: Validation of a method to quantify copper and other metals in olive fruit by ETAAS. Application to the residual metal control after olive tree treatments with different copper formulations
Author: Soares, Maria Elisa
Pereira, J.A.
Bastos, Maria de Lourdes
Keywords: Method validation
Atomic absorption spectrometry
Metal residues
Olive fruit
Fungicide residues
Issue Date: 2006
Publisher: ACS
Citation: Soares, Maria Elisa; Pereira, J.A.; Bastos, Maria de Lourdes (2006) - Validation of a method to quantify copper and other metals in olive fruit by ETAAS. Application to the residual metal control after olive tree treatments with different copper formulations. Journal of Agricultural and Food Chemistry. ISSN 0021-8561. 54:11, p. 3923-3928
Abstract: An electrothermal atomization atomic absorption spectrometry method was validated to quantify residues of copper, aluminum, cadmium, chromium, iron, lead, and nickel in olive fruit. The linearity ranges under the optimized conditions were 0.19-20.0, 1.11-50.0, 0.02-2.0, 0.15-20.0, 0.80- 20.0, 0.35-50.0, and 0.60-50.0 íg/L, respectively. The limits of quantification were, expressed in nanograms per gram of dry weight, 12.6, 74.0, 1.34, 10.0, 53.4, 23.4, and 40.0, respectively. For all of the metals the precision of the instrumental method was <6.3% and that of the analytical method was always <10%, except for aluminum, for which the precision was 12%. The accuracy of the method was evaluated according to the standard additions method, the recoveries being >90% for all of the added concentrations. An interference study was also carried out in a simulated matrix, and it was verified that the deviations of the expected values were <6% for all of the metals. The method was applied to the monitoring of the residues of the referred metals in olive fruits collected from trees pulverized with three different copper formulations available on the market to control fungal diseases.
Peer review: yes
URI: http://hdl.handle.net/10198/748
Appears in Collections:PTV - Artigos em Revistas Indexados ao ISI/Scopus

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