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

• Type: Article in International Scientific Journal
• Date: 2006

Authors

Soares, ME (Author) Other; Pereira, JA (Author) Other; Bastos, ML (Author) FFUP

Journal

Title: Journal of Agricultural and Food Chemistry

Vol. 54

Pages: 3923-3928

ISSN: 0021-8561

Publisher: American Chemical Society

Indexing

ISI Web of Knowledge - 12 Citations

Scopus - 8 Citations

Scientific classification

FOS: Agrarian Sciences > Other Agrarian Sciences

Other information

Authenticus ID: P-004-KPX

DOI: 10.1021/jf0608930

Abstract (EN): 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 mu g/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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6