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Sequential injection methodology for carbon speciation in bathing waters

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dc.contributor.authorSantos, Inês C.
dc.contributor.authorMesquita, Raquel B. R.
dc.contributor.authorMachado, Ana
dc.contributor.authorBordalo, Adriano A.
dc.contributor.authorRangel, António O. S. S.
dc.date.accessioned2014-05-08T14:06:44Z
dc.date.available2014-05-08T14:06:44Z
dc.date.issued2013
dc.description.abstractA sequential injection method (SIA) for carbon speciation in inland bathing waters was developed comprising, in a single manifold, the determination of dissolved inorganic carbon (DIC), free dissolved carbon dioxide (CO2), total carbon (TC), dissolved organic carbon and alkalinity. The determination of DIC, CO2 and TC was based on colour change of bromothymol blue (660 nm) after CO2 diffusion through a hydrophobic membrane placed in a gas diffusion unit (GDU). For the DIC determination, an in-line acidification prior to the GDU was performed and, for the TC determination, an in-line UV photo-oxidation of the sample prior to GDU ensured the conversion of all carbon forms into CO2. Dissolved organic carbon (DOC) was determined by subtracting the obtained DIC value from the TC obtained value. The determination of alkalinity was based on the spectrophotometric measurement of bromocresol green colour change (611 nm) after reaction with acetic acid. The developed SIA method enabled the determination of DIC (0.24-3.5 mg C L-1), CO2 (1.0-10 mg C L-1), TC (0.50-4.0 mg C L-1) and alkalinity (1.2-4.7 mg C L-1 and 4.7-19 mgC L-1) with limits of detection of: 9.5 mu g C L-1, 20 mu g C L-1, 0.21 mg C L-1, 0.32 mg C L-1, respectively. The SIA system was effectively applied to inland bathing waters and the results showed good agreement with reference procedures.por
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.citationSANTOS, Inês C. ...[et al.] - Sequential injection methodology for carbon speciation in bathing waters. Analytica Chimica Acta. ISSN 0003-2670. Vol. 778 (2013), p. 38-47por
dc.identifier.doi10.1016/j.aca.2013.03.043
dc.identifier.eissn1873-4324
dc.identifier.issn0003-2670
dc.identifier.urihttp://hdl.handle.net/10400.14/14319
dc.identifier.wosWOS:000318959400006
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherElsevierpor
dc.subjectCarbon speciationpor
dc.subjectGas diffusion unitpor
dc.subjectIn-line UV photo-oxidationpor
dc.subjectSequential injection analysispor
dc.subjectMulti-parametric determinationpor
dc.titleSequential injection methodology for carbon speciation in bathing waterspor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage47
oaire.citation.startPage38
oaire.citation.titleAnalytica Chimica Acta
oaire.citation.volume778
person.familyNameSantos
person.familyNameMesquita
person.familyNameMachado
person.familyNameA. Bordalo
person.familyNameSantos Silva Rangel
person.givenNameInês
person.givenNameRaquel
person.givenNameAna
person.givenNameAdriano
person.givenNameAntónio Osmaro
person.identifierJ-4630-2013
person.identifier1484393
person.identifier.ciencia-idEB1D-DEE3-0B60
person.identifier.ciencia-id1514-BAFA-B5B2
person.identifier.ciencia-id8B15-A841-2083
person.identifier.ciencia-idD61D-7CFB-178A
person.identifier.orcid0000-0002-4609-7085
person.identifier.orcid0000-0001-7745-1860
person.identifier.orcid0000-0003-0732-1571
person.identifier.orcid0000-0002-9637-6541
person.identifier.orcid0000-0002-6486-8947
person.identifier.ridJ-4829-2013
person.identifier.ridJ-4630-2013
person.identifier.scopus-author-id36953321400
person.identifier.scopus-author-id7005556626
person.identifier.scopus-author-id56517107800
person.identifier.scopus-author-id7004738492
person.identifier.scopus-author-id7004827387
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor
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