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Determination of total sulphur dioxide in beer by flow injection spectrophotometry using gas-diffusion and the merging zones technique

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dc.contributor.authorFernandes, S. M. V.
dc.contributor.authorRangel, António O. S. S.
dc.contributor.authorLima, J. L. F. C
dc.date.accessioned2011-10-18T17:58:55Z
dc.date.available2011-10-18T17:58:55Z
dc.date.issued1998
dc.description.abstractA flow injection system for the determination of total sulphur dioxide in beer is described. The methodology involves the same colorimetric reaction of the reference method between SO2, p-rosaniline and formaldehyde. The sample is introduced into the manifold without previous pretreatment, the hydrolysis process, isolation of the SO2 from the matrix and the colorimetric reaction, being carried out inside the flow tubes. To isolate the SO2, a gas-diffusion unit was included in the system and to minimise p-rosaniline consumption, a merging zones technique was used. The results obtained were in good agreement with a reference method (relative deviations lower than 5%), the precision being better than 2.5% (relative standard deviation). A sampling-rate of 30 samples per hour was obtained and the consumption of p-rosaniline was reduced 10 fold when compared to the reference method.por
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.citationFERNANDES, S. M. V.; RANGEL, A. O. S. S; LIMA, J. L. F. C. - Determination of total sulphur dioxide in beer by flow injection spectrophotometry using gas-diffusion and the merging zones technique. Journal of the Institute of Brewing. ISSN 0046-9750. 1998, Vol.104, n.º 4 (1998), p. 203-205por
dc.identifier.doi10.1002/j.2050-0416.1998.tb00992.x
dc.identifier.urihttp://hdl.handle.net/10400.14/6445
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherInstitute of Brewingpor
dc.subjectFlow injectionpor
dc.subjectTotal sulphur dioxide determinationpor
dc.subjectSpectrophotometrypor
dc.subjectBeerpor
dc.titleDetermination of total sulphur dioxide in beer by flow injection spectrophotometry using gas-diffusion and the merging zones techniquepor
dc.typejournal article
dspace.entity.typePublication
person.familyNameSantos Silva Rangel
person.familyNameLima
person.givenNameAntónio Osmaro
person.givenNameJosé
person.identifierR-000-8FJ
person.identifier.ciencia-idD61D-7CFB-178A
person.identifier.ciencia-id4811-9AA9-D673
person.identifier.orcid0000-0002-6486-8947
person.identifier.orcid0000-0002-8906-9826
person.identifier.scopus-author-id7004827387
person.identifier.scopus-author-id10141079100
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication467be022-fd9c-4549-aa48-48ebcc1098eb
relation.isAuthorOfPublication71f20aa3-d4ae-40c3-a9ef-27d88442d1e0
relation.isAuthorOfPublication.latestForDiscovery71f20aa3-d4ae-40c3-a9ef-27d88442d1e0

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