Use este identificador para citar ou linkar para este item:
https://repositorio.inpa.gov.br/handle/1/16425
Registro completo de metadados
Campo DC | Valor | Idioma |
---|---|---|
dc.contributor.author | Rocha, Júlio César | - |
dc.contributor.author | Zara, Luiz Fabrício | - |
dc.contributor.author | Rosa, André Henrique | - |
dc.contributor.author | Sargentini, Ézio | - |
dc.contributor.author | Burba, Peter | - |
dc.date.accessioned | 2020-06-05T17:59:39Z | - |
dc.date.available | 2020-06-05T17:59:39Z | - |
dc.date.issued | 2000 | - |
dc.identifier.uri | https://repositorio.inpa.gov.br/handle/1/16425 | - |
dc.description.abstract | A sequential system for fractionation by ultrafiltration (SSFU) equipped with advanced membranes filters (molecular size cut-off: 5, 10, 30, 50 and 100 kDalton) of the polyethersulfone type was developed for analytical fractionation of humic substances (HS) extracted from aquatic systems or soils. The device consists of five membrane filters (Sartocon® Micro) operated by a multi-channel peristaltic pump, enabling an easy handling, working in a closed system and with simple collection of the six obtained fractions (F1>100; F2: 100-50; F3: 50-30; F4:30-10; F5: 10-5 and F6 <5 kDalton). Then, the HS sample (250 mL solution 1.0 mg/mL, pH 5.0 to 6.0) to be fractionated is pumped by pump through the series of membrane filters with a tangential flow of 85 mL/min, initial pressure 0.2 to 0.3 bar and permeation flux through the membranes of 0.8 to 1.4 mL/min. The overall time for fractionation and cleaning of the device is about 10 h and 25 mL of each fraction is obtained. | en |
dc.language.iso | pt_BR | pt_BR |
dc.relation.ispartof | Volume 23, Número 3, Pags. 410-412 | pt_BR |
dc.rights | Attribution-NonCommercial-NoDerivs 3.0 Brazil | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/br/ | * |
dc.title | Humic substances: A sequential device for fractionation by ultrafiltration with molecular size basis | en |
dc.title.alternative | Substâncias húmicas: Sistema de fracionamento sequencial por ultrafiltração com base no tamanho molecular | pt_BR |
dc.type | Artigo | pt_BR |
dc.identifier.doi | 10.1590/S0100-40422000000300020 | - |
dc.publisher.journal | Química Nova | pt_BR |
Aparece nas coleções: | Artigos |
Arquivos associados a este item:
Arquivo | Descrição | Tamanho | Formato | |
---|---|---|---|---|
artigo-inpa.pdf | 104,97 kB | Adobe PDF | ![]() Visualizar/Abrir |
Este item está licenciada sob uma Licença Creative Commons