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http://acervodigital.unesp.br/handle/11449/65626
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DC Field | Value | Language |
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dc.contributor.author | Saint'Pierre, Tatiana D. | - |
dc.contributor.author | De Queiróz, Roldão R. U. | - |
dc.contributor.author | De Souza, Ivan G. | - |
dc.contributor.author | Gomes Neto, José Anchieta | - |
dc.date.accessioned | 2014-05-27T11:19:39Z | - |
dc.date.accessioned | 2016-10-25T18:15:26Z | - |
dc.date.available | 2014-05-27T11:19:39Z | - |
dc.date.available | 2016-10-25T18:15:26Z | - |
dc.date.issued | 1998-12-01 | - |
dc.identifier | http://dx.doi.org/10.1590/S0103-50531998000200005 | - |
dc.identifier.citation | Journal of the Brazilian Chemical Society, v. 9, n. 2, p. 145-150, 1998. | - |
dc.identifier.issn | 0103-5053 | - |
dc.identifier.uri | http://hdl.handle.net/11449/65626 | - |
dc.identifier.uri | http://acervodigital.unesp.br/handle/11449/65626 | - |
dc.description.abstract | The aim of this work is to propose a flow spectrophotometric procedure for manganese determination in steel based on electrochemical oxidation of Mn(II) to Mn(VII) at a Pt electrode surface by means of the catalytic effect of Ag(I). The on-line oxidation step was obtained by injecting sample and electrolyte solution directly into an electrolytic cell. After electrolysis, the injectate was homogenized by bubbling air. The permanganate ions produced were passed through the spectrophotometer where absorbance was monitored at 545 nm. Effects of direct current, silver concentration, timing, flow rates, concentration and composition of support electrolyte were investigated. Direct current and silver content manifested themselves as the most relevant parameters. For determination of manganese in the 5.00 - 150 mg L -1 range (r=0,9998) and 60 s electrolysis time, the sample throughput was 20 h -1. Accuracy was assessed by analyzing ten steel standard reference materials. Results are precise (R.S.D. <3%) and in agreement with certified values of reference materials and with standard methods at 95% confidence level. | en |
dc.format.extent | 145-150 | - |
dc.language.iso | eng | - |
dc.source | Scopus | - |
dc.subject | Coulometric reagent generation | - |
dc.subject | FIA | - |
dc.subject | Manganese | - |
dc.subject | Spectrophotometry | - |
dc.title | Spectrophotometric determination of manganese in steels by on-line electrochemical oxidation | en |
dc.type | outro | - |
dc.contributor.institution | Universidade Federal de Santa Catarina (UFSC) | - |
dc.contributor.institution | Universidade Estadual Paulista (UNESP) | - |
dc.description.affiliation | Departamento de Química Univ. Federal de Santa Catarina, C.P. 476, 88040-900 Florianópolis - SC | - |
dc.description.affiliation | Depto. de Quim. Analítica Instituto de Química UNESP, C.P. 355, 14800-900 Araraquara - SP | - |
dc.description.affiliationUnesp | Depto. de Quim. Analítica Instituto de Química UNESP, C.P. 355, 14800-900 Araraquara - SP | - |
dc.identifier.doi | 10.1590/S0103-50531998000200005 | - |
dc.identifier.scielo | S0103-50531998000200005 | - |
dc.identifier.wos | WOS:000074749300005 | - |
dc.rights.accessRights | Acesso aberto | - |
dc.identifier.file | 2-s2.0-0005219755.pdf | - |
dc.relation.ispartof | Journal of the Brazilian Chemical Society | - |
dc.identifier.scopus | 2-s2.0-0005219755 | - |
Appears in Collections: | Artigos, TCCs, Teses e Dissertações da Unesp |
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