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Development of a gas diffusion multicommuted flow injection system for the determination of sulfur dioxide in wines, comparing malachite green and pararosaniline chemistries

2009Journal article Restricted access
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dc.contributor.authorOliveira, Sara M.
dc.contributor.authorLopes, Teresa I. M. S.
dc.contributor.authorTóth, Ildikó V.
dc.contributor.authorRangel, António O. S. S.
dc.date.accessioned2010-10-08T10:26:20Z
dc.date.available2010-10-08T10:26:20Z
dc.date.issued2009
dc.description.abstractA flow system based on the multicommutation concept was developed for the determination of free and total sulfur dioxide in table wines, exploiting gas diffusion separation and spectrophotometric detection. The system allowed the comparison of malachite green and pararosaniline chemistries, using the same manifold configuration. Free and total SO2 were determined within the ranges 1.00-40.0 and 25.0-250 mg L-1, at determination throughputs of 25 and 23 h-1, respectively. Employing the malachite green reaction, detection limits of 0.3 and 0.8mgL-1 were attained for free and totalSO2, respectively. Pararosaniline chemistry provided detection limits of 0.6 mg L-1 for free SO2 and 0.8 mg L-1 for total SO2. Relative standard deviations better than 1.8 and 1.4% were obtained by the malachite green and pararosaniline reactions, respectively. With regard to the two tested chemistries, 18 wines were analyzed and the results achieved by the pararosaniline reaction compared better with those furnished by the recommended procedure.por
dc.identifier.citation"Journal of Agricultural and Food Chemistry". ISSN 1520-5118. 57 (2009) 3415–3422por
dc.identifier.doi10.1021/jf803639n
dc.identifier.urihttp://hdl.handle.net/10400.14/2704
dc.language.isoengpor
dc.publisherAmerican Chemical Societypor
dc.subjectMulticommutationpor
dc.subjectGas diffusionpor
dc.subjectSpectrophotometrypor
dc.subjectSulfur dioxidepor
dc.subjectWinespor
dc.subjectMalachitepor
dc.subjectGreenpor
dc.subjectPararosanilinepor
dc.titleDevelopment of a gas diffusion multicommuted flow injection system for the determination of sulfur dioxide in wines, comparing malachite green and pararosaniline chemistriespor
dc.typejournal article
dspace.entity.typePublication
person.familyNameOliveira
person.familyNameTóth
person.familyNameSantos Silva Rangel
person.givenNameSara
person.givenNameIldikó
person.givenNameAntónio Osmaro
person.identifier.ciencia-idD61D-7CFB-178A
person.identifier.orcid0000-0003-0649-2694
person.identifier.orcid0000-0002-7342-1063
person.identifier.orcid0000-0002-6486-8947
person.identifier.ridM-5180-2013
person.identifier.ridG-1733-2010
person.identifier.scopus-author-id16022986400
person.identifier.scopus-author-id35512332800
person.identifier.scopus-author-id7004827387
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication6663c3d3-4fe7-4fe6-a175-8f9e1f76d978
relation.isAuthorOfPublication7889563f-f3fc-4057-a97c-b51425b4dc46
relation.isAuthorOfPublication467be022-fd9c-4549-aa48-48ebcc1098eb
relation.isAuthorOfPublication.latestForDiscovery6663c3d3-4fe7-4fe6-a175-8f9e1f76d978

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