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Development of a sequential injection gas diffusion system for the determination of ammonium in transitional and coastal waters

dc.contributor.authorSegundo, Ricardo Alves
dc.contributor.authorMesquita, Raquel B. R.
dc.contributor.authorFerreira, Maria Teresa Soares Oliveira Barbosa
dc.contributor.authorTeixeira, Catarina Fernanda Carvalho Pinheiro
dc.contributor.authorBordalo, Adriano Agostinho
dc.contributor.authorRangel, António O. S. S.
dc.date.accessioned2012-01-12T12:09:53Z
dc.date.available2012-01-12T12:09:53Z
dc.date.issued2011
dc.description.abstractThis work describes the development of a sequential injection system for the ammonium determination in transitional and coastal waters with a wide salinity range. Estuarine waters are rather complex matrices as their characteristics change considerably along the salinity gradient, as well as the ammonium levels. The developed system effectively solves these issues by converting ammonium into ammonia and using a gas diffusion unit (GDU) for matrix removal. The ammonium determination in a wide quantification range (0.1–5.0 mg L−1) was obtained with small changes in the protocol sequence and was applied, not only to estuarine samples, but also well water samples (low salinity) and coastal waters (higher salinity). Spectrophotometry was the chosen detection system to measure the absorbance change in the bromothymol blue acid base indicator caused by the diffusion of ammonia through the GDU. Additionally, the developed system used a green chemistry approach, as there was no indicator reagent consumption per determination, still maintaining a good precision (relative standard deviation lower than 2%) and a low detection limit, 27 μg L−1 (1.5 μM).por
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.citationSEGUNDO, Ricardo ...[et al.] - Development of a sequential injection gas diffusion system for the determination of ammonium in transitional and coastal waters. Analytical Methods. ISSN 1759-9679. Vol. 3, n.º 9 (2011), p. 2049-2055por
dc.identifier.doi10.1039/C1AY05129F
dc.identifier.eissn1759-9679
dc.identifier.issn1759-9660
dc.identifier.urihttp://hdl.handle.net/10400.14/7429
dc.identifier.wosWOS:000294472900017
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherRoyal Society of Chemistrypor
dc.titleDevelopment of a sequential injection gas diffusion system for the determination of ammonium in transitional and coastal waterspor
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F41859%2F2007/PT
oaire.citation.endPage2055
oaire.citation.issue9
oaire.citation.startPage2049
oaire.citation.titleAnalytical Methods
oaire.citation.volume3
oaire.fundingStreamSFRH
person.familyNameMesquita
person.familyNameFerreira
person.familyNameDE CARVALHO PINHEIRO TEIXEIRA
person.familyNameA. Bordalo
person.familyNameSantos Silva Rangel
person.givenNameRaquel
person.givenNameMaria Teresa
person.givenNameCATARINA FERNANDA
person.givenNameAdriano
person.givenNameAntónio Osmaro
person.identifierJ-4630-2013
person.identifier.ciencia-idEB1D-DEE3-0B60
person.identifier.ciencia-id8213-9759-181F
person.identifier.ciencia-id8B15-A841-2083
person.identifier.ciencia-idD61D-7CFB-178A
person.identifier.orcid0000-0001-7745-1860
person.identifier.orcid0000-0002-8446-5600
person.identifier.orcid0000-0003-3842-7133
person.identifier.orcid0000-0002-9637-6541
person.identifier.orcid0000-0002-6486-8947
person.identifier.ridJ-4630-2013
person.identifier.ridF-7731-2015
person.identifier.scopus-author-id7005556626
person.identifier.scopus-author-id7004738492
person.identifier.scopus-author-id7004827387
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor
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