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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/33697
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dc.contributor.authorGigante, A. C.-
dc.contributor.authorGotardo, M. A.-
dc.contributor.authorTognolli, J. O.-
dc.contributor.authorPezza, Leonardo-
dc.contributor.authorPezza, Helena Redigolo-
dc.date.accessioned2014-05-20T15:22:46Z-
dc.date.accessioned2016-10-25T17:56:33Z-
dc.date.available2014-05-20T15:22:46Z-
dc.date.available2016-10-25T17:56:33Z-
dc.date.issued2004-05-01-
dc.identifierhttp://dx.doi.org/10.1016/j.microc.2003.12.002-
dc.identifier.citationMicrochemical Journal. Amsterdam: Elsevier B.V., v. 77, n. 1, p. 47-51, 2004.-
dc.identifier.issn0026-265X-
dc.identifier.urihttp://hdl.handle.net/11449/33697-
dc.identifier.urihttp://acervodigital.unesp.br/handle/11449/33697-
dc.description.abstractIn the present study. a spectrophotometric method for the determination of formaldehyde by using chromotropic acid was devised. in which the use of potentially hazardous and corrosive concentrated sulfuric acid was eliminated and advantageously C replaced by a mixture of H, concentrated H3PO4 and H2O2. The reaction between formaldehyde and chromotropic acid (CA) in a cone phosphoric acid medium was accelerate by irradiating the mixture with microwave energy for 35 s (1100 W), producing a violetred compound (lambda(max)=570 nm). Beer's Law is obeyed in a concentration range of 0.8-4.8 mg 1(-1) of formaldehyde with a good correlation coefficient (r = 0.9968). The proposed method was applied in the analysis of formaldehyde in commercial disinfectants. Recoveries were within 98.0-100.4%, with standard deviations ranging from 0.03 to 0.13%. (C) 2003 Elsevier B.V All rights reserved.en
dc.format.extent47-51-
dc.language.isoeng-
dc.publisherElsevier B.V.-
dc.sourceWeb of Science-
dc.subjectformaldehydept
dc.subjectchromotropic acidpt
dc.subjectspectrophotometrypt
dc.subjectmicrowave ovenpt
dc.titleSpectrophotometric determination of formaldehyde with chromotropic acid in phosphoric acid medium assisted by microwave ovenen
dc.typeoutro-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.description.affiliationUNESP, Inst Quim, BR-14801970 Araraquara, SP, Brazil-
dc.description.affiliationUnespUNESP, Inst Quim, BR-14801970 Araraquara, SP, Brazil-
dc.identifier.doi10.1016/j.microc.2003.12.002-
dc.identifier.wosWOS:000221065100008-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofMicrochemical Journal-
dc.identifier.orcid0000-0003-0197-7369pt
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