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Analytical method validation to evaluate dithiocarbamates degradation in biobeds in South of Brazil. Repositório Alice
VARELI, C. S.; PIZZUTTI, I. R.; GEBLER, L.; CARDOSO, C. D.; GAI, D. S. H.; FONTANA, M. E. Z..
In order to evaluate the efficiency of biobeds on DTC degradation, the aim of this study was to apply, optimize and validate a method to determine dithiocarbamate (mancozeb) in biobeds using gas chromatography-tandem mass spectrometry (GC-MS). The DTC pesticide mancozeb was hydrolysed in a tin (II) chloride solution at 1.5% in HCl (4 mol L−1 ), during 1 h in a water bath at 80 °C, and the CS2 formed was extracted in isooctane. After cooling, 1 mL of the organic layer was transferred to an auto sampler vial and analyzed by GC-MS. A complete validation study was performed and the following parameters were assessed: linearity of the analytical curve (r2 ), estimated method and instrument limits of detection and limits of quantification (LODm, LODi,...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Biobed; Biomixture; Dithiocarbamates; GC-MS; Biodegradation; Degradation.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1102339
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Influence of novel lignocellulosic residues in a biobed biopurification system on the degradation of pesticides applied in repeatedly high doses Electron. J. Biotechnol.
Diez,M. Cristina; Tortella,Gonzalo R; Briceño,Gabriela; Castillo,Maria del Pilar; Díaz,Jorge; Palma,Graciela; Altamirano,Carolina; Calderón,Carolina; Rubilar,Olga.
Background: The biobed is a simple biopurification system used to prevent the point-source pesticide contamination that occurs at farm level. The typical composition of the biomixture used in this system is soil, peat and straw in volumetric proportions of 1:1:2. The principal component is straw due to its positive effects on biological activity and thus pesticide degradation. However, access to straw can be limited in some regions, so it must be replaced by other more readily available lignocellulosic residues. Results: Therefore, two alternate lignocellulosic materials (barley husks and pine sawdust) were evaluated as partial substitutes for straw. The degradation of a repeatedly applied mixture of six pesticides by these alternates was assessed. The...
Tipo: Journal article Palavras-chave: Biopurification system; Biomixture; Lignocellulosic materials; Pesticide degradation.
Ano: 2013 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582013000600011
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