Use este identificador para citar ou linkar para este item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1140128
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dc.contributor.authorMORAIS, P. A. de O.
dc.contributor.authorSOUZA, D. M. de
dc.contributor.authorMADARI, B. E.
dc.date.accessioned2022-02-16T12:01:54Z-
dc.date.available2022-02-16T12:01:54Z-
dc.date.created2022-02-16
dc.date.issued2021
dc.identifier.citationEuropean Journal of Chemistry, v. 12, n. 4, p. 377-381, Dec. 2021.
dc.identifier.issn2153-2257
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1140128-
dc.descriptionSoil organic matter (SOM) is usually quantified by Walkley-Black titration method or using a spectrophotometric method. This study proposes an alternative method for quantification of SOM using digital image from scanner and mathematical algorithms to replace titration and spectrophotometry procedures. For this, after SOM oxidation by potassium dichromate, digital images were acquired. Posteriorly, extraction of RGB color histograms from images have occurred, followed by the use of multivariate calibration method: partial least squares (PLS). Six soil samples were analyzed. We used the Walkley-Black method as reference. SOM was estimated by images using the PLS tool. The new method, besides being a fast, low cost, and more operational alternative, presented statistically equal results in relation to the reference method, as assessed by the Student t-test and F-test at 95 % confidence.
dc.language.isoeng
dc.rightsopenAccess
dc.subjectWalkley-Black method
dc.subjectPartial least squares
dc.titleMultivariate analysis of images in spectrophotometric methods: quantification of soil organic matter.
dc.typeArtigo de periódico
dc.subject.thesagroMatéria Orgânica
dc.subject.thesagroSolo
dc.subject.thesagroEspectrometria
dc.subject.nalthesaurusSoil organic matter
dc.subject.nalthesaurusScanners
dc.subject.nalthesaurusDigital images
dc.subject.nalthesaurusSpectrophotometers
riaa.ainfo.id1140128
riaa.ainfo.lastupdate2022-02-16
dc.identifier.doi10.5155/eurjchem.12.4.377-381.2122
dc.contributor.institutionPEDRO AUGUSTO DE OLIVEIRA MORAIS, UFG; DIEGO MENDES DE SOUZA, Polícia Civil, Distrito Federal, DF; BEATA EMOKE MADARI, CNPAF.
Aparece nas coleções:Artigo em periódico indexado (CNPAF)

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