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Determinação colorimétrica de cobre e zinco, na análise foliar

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dc.contributor.author Gallo, J. Romano
dc.contributor.author Coelho, Fernando A. Soares
dc.date.accessioned 2019-01-10T16:18:10Z
dc.date.available 2019-01-10T16:18:10Z
dc.date.issued 1965-03
dc.identifier.citation GALLO, J. R.; COELHO, F. A. S. Determinação colorimétrica de cobre e zinco, na análise foliar. Bragantia, Campinas, v. 24, n. 8, p. 37 - 45, mar. 1965. pt_BR
dc.identifier.issn 1678-4499
dc.identifier.uri http://dx.doi.org/10.1590/S0006-87051965000100046 pt_BR
dc.identifier.uri http://www.sbicafe.ufv.br/handle/123456789/10843
dc.description.abstract An analytical procedure for the determination of small concentrations of copper and zinc by 2-carboxy-2'hydroxy-5'-sulfoiormazylbenzene (Zincon) method in leaf samples is described. Copper and zinc are measured colorimetrically after they are separated from other elements by extraction with dithizone from a solution prepared by wet digestion of one-gram sample of dry plant material with a mixture of HN03—H2S04—HClO4. The method as outlined here is sufficiently sensitive and accurate in the analysis of leaves for diagnosis of nutritional deficiencies of these elements, being suitable for concentrations of 5 to 30 ppm in plant material. Color is formed at a reagent concentration of 4.5 x 10—5M and a wave length of 590mm is used for analytical measurements. Analyses by the spectrophotometry procedure reported are faster and the results compare with the Polarographic method. pt_BR
dc.format pdf pt_BR
dc.language.iso pt_BR pt_BR
dc.publisher Instituto Agronômico (IAC) pt_BR
dc.relation.ispartofseries Bragantia;v. 24, n. 8, p. 37 - 45, 1965
dc.rights Open Access pt_BR
dc.subject.classification Cafeicultura::Solos e nutrição do cafeeiro pt_BR
dc.title Determinação colorimétrica de cobre e zinco, na análise foliar pt_BR
dc.title Colorimetric determination of copper and zinc for leaf analysis studies pt_BR
dc.type Artigo pt_BR

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