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Automated analytical microsystem for the spectrophotometric monitoring of titratable acidity in white, rosé and red wines

2019Journal article Restricted access
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dc.contributor.authorSández, Natàlia
dc.contributor.authorCalvo-López, Antonio
dc.contributor.authorVidigal, Susana S. M. P.
dc.contributor.authorRangel, António O. S. S.
dc.contributor.authorAlonso-Chamarro, Julián
dc.date.accessioned2019-10-11T13:51:01Z
dc.date.available2019-10-11T13:51:01Z
dc.date.issued2019
dc.description.abstractThe design, construction and evaluation of a low-cost cyclic olefin copolymer (COC)-based continuous flow microanalyzer with optical detection to determine the titratable acidity content of wine is here presented. The analysis method is based on the monitoring of the blue coloration decrease of a buffered bromothymol blue (BTB) solution in the presence of the acidic compounds of wine. The microanalyzer monolithically integrates the required microfluidic motifs as well as an optical flow cell where the measurements are performed by using a miniaturized and versatile photometric detection system. Fluid management is totally automated by the use of computer-controlled microvalves, permitting the automatic calibration of the system as well as the automatic sampling, including in-line dilution and analysis. The reduced size of the whole system along with its high simplicity and automation make it suitable for its application to the on-line monitoring of titratable acidity during wine-making processes. With the optimal conditions, a linear range up to 0.50 g L−1 tartaric acid, a quantification limit (LOQ) of 0.01 g L−1 and a detection limit (LOD) of 0.004 g L−1 were obtained, covering the most common acidity content of musts and wines. A sampling rate up to 26 h−1 could be achieved, consuming less than 3 mL of inexpensive reagents per analysis and requiring no pretreatment of the sample. The microsystem has been successfully applied to the quantification of the titratable acidity content of several wine samples, being the results in excellent agreement with the ones obtained by the reference method.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationSández, N., Calvo-López, A., Vidigal, S. S. M. P., Rangel, A. O. S. S., & Alonso-Chamarro, J. (2019). Automated analytical microsystem for the spectrophotometric monitoring of titratable acidity in white, rosé and red wines. Analytica Chimica Acta, 1091, 50–58. https://doi.org/10.1016/j.aca.2019.09.052pt_PT
dc.identifier.doi10.1016/j.aca.2019.09.052pt_PT
dc.identifier.eid85072596051
dc.identifier.eissn1873-4324
dc.identifier.issn0003-2670
dc.identifier.pmid31679574
dc.identifier.urihttp://hdl.handle.net/10400.14/28352
dc.identifier.wos000493947000005
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationNORTE-01-0145-FEDER-000030
dc.relationCTQ2017-85011-R
dc.relation2017 SGR 220
dc.subjectLab on a chippt_PT
dc.subjectMiniaturizationpt_PT
dc.subjectAutomationpt_PT
dc.subjectCyclic olefin copolymerpt_PT
dc.subjectTitratable aciditypt_PT
dc.subjectWine aciditypt_PT
dc.titleAutomated analytical microsystem for the spectrophotometric monitoring of titratable acidity in white, rosé and red winespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage58
oaire.citation.startPage50
oaire.citation.titleAnalytica Chimica Actapt_PT
oaire.citation.volume1091
person.familyNameVidigal
person.familyNameSantos Silva Rangel
person.givenNameSusana
person.givenNameAntónio Osmaro
person.identifier.ciencia-id2919-B77C-11C0
person.identifier.ciencia-idD61D-7CFB-178A
person.identifier.orcid0000-0002-0213-063X
person.identifier.orcid0000-0002-6486-8947
person.identifier.ridM-4661-2013
person.identifier.scopus-author-id11739488200
person.identifier.scopus-author-id7004827387
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication59453cc2-ee50-4a1d-bbfc-924ca6417004
relation.isAuthorOfPublication467be022-fd9c-4549-aa48-48ebcc1098eb
relation.isAuthorOfPublication.latestForDiscovery59453cc2-ee50-4a1d-bbfc-924ca6417004

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