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Chlormequat selective electrodes: construction, evaluation and application at FIA systems

2003Journal article Open access
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dc.contributor.authorFerreira Sales, Maria Goreti
dc.contributor.authorLino, Nuno F. M. C.
dc.contributor.authorPaíga, Paula
dc.date.accessioned2013-11-27T16:33:08Z
dc.date.available2013-11-27T16:33:08Z
dc.date.issued2003
dc.description.abstractA flow injection analysis (FIA) system having a chlormequat selective electrode is proposed. Several electrodes with poly(vinyl chloride) based membranes were constructed for this purpose. Comparative characterization suggestedthe use of membrane with chlormequat tetraphenylborate and dibutylphthalate. On a single-line FIA set-up, operating with 1x10-2 mol L-1 ionic strength and 6.3 pH, calibration curves presented slopes of 53.6±0.4mV decade-1 within 5.0x10-6 and1.0x10-3 mol L-1, andsquaredcorrelation coefficients >0.9953. The detection limit was 2.2x10-6 mol L-1 and the repeatability equal to ±0.68mV (0.7%). A dual-channel FIA manifold was therefore constructed, enabling automatic attainment of previous ionic strength andpH conditions and thus eliminating sample preparation steps. Slopes of 45.5±0.2mV decade -1 along a concentration range of 8.0x10-6 to 1.0x10-3 mol L-1 with a repeatability ±0.4mV (0.69%) were obtained. Analyses of real samples were performed, and recovery gave results ranging from 96.6 to 101.1%.por
dc.identifier10.1080/0306731031000076878
dc.identifier.doi10.1080/0306731031000076878pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.22/3006
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherTaylor & Francispor
dc.relation.ispartofseriesInternational Journal of Environmental Analytical Chemistry; Vol.83, Issue 4
dc.relation.publisherversionhttp://www.tandfonline.com/doi/abs/10.1080/0306731031000076878#.UpYVnEr6Q25por
dc.subjectChlormequatpor
dc.subjectGrowth regulatorpor
dc.subjectPesticidespor
dc.subjectPotentiometrypor
dc.subjectIon-selective electrodepor
dc.subjectFIApor
dc.titleChlormequat selective electrodes: construction, evaluation and application at FIA systemspor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage305por
oaire.citation.issueIssue 4
oaire.citation.startPage295por
oaire.citation.titleInternational Journal of Environmental Analytical Chemistrypor
oaire.citation.volumeVol. 83por
person.familyNameFerreira Sales
person.familyNamePaíga
person.givenNameMaria Goreti
person.givenNamePaula
person.identifier826970
person.identifier1668889
person.identifier.ciencia-idE31F-1630-42BB
person.identifier.ciencia-id331A-5D6A-D3C8
person.identifier.orcid0000-0001-9936-7336
person.identifier.orcid0000-0002-9593-1355
person.identifier.ridK-9199-2013
person.identifier.ridQ-4930-2018
person.identifier.scopus-author-id7005174717
person.identifier.scopus-author-id6506638953
rcaap.rightsopenAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublicationb6d3a2d0-608a-4a92-834b-8d7b29069fef
relation.isAuthorOfPublication4a0677dc-0b54-4831-aa9a-4a73f0df911d
relation.isAuthorOfPublication.latestForDiscovery4a0677dc-0b54-4831-aa9a-4a73f0df911d

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