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A greener alternative for inline nitrate reduction in the sequential injection determination of NOx in natural waters: replacement of cadmium reduction by UV radiation

2017Journal article Restricted access
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dc.contributor.authorMachado, Ana
dc.contributor.authorMarshall, Graham
dc.contributor.authorBordalo, Adriano A.
dc.contributor.authorMesquita, Raquel B. R.
dc.date.accessioned2017-10-17T15:00:47Z
dc.date.available2017-10-17T15:00:47Z
dc.date.issued2017
dc.description.abstractThe use of sequential injection analysis (SIA) for key nutrient determination in water has been previously described using a copperised cadmium column to attain nitrate reduction to nitrite prior to determination, yielding hazardous waste. Here, a greener alternative is proposed for nitrate reduction using a UV lamp, aiming to avoid the use of cadmium. This method was based on the colorimetric Griess reaction for nitrite determination, after the UV reduction of nitrate. The reduction was performed inline during the determination of nitrite, minimizing both effluent production and the overall determination rate. Its application to natural waters, namely river water, proved to be effective as the results were comparable to those obtained with the reference procedure. Furthermore, certified reference samples were analysed, and an average of 3% relative deviation was observed. A limit of detection of 5.30 mM was achieved, enabling the nitrate determination in the dynamic range of 25-500 mM with a determination rate of 24 h(-1), and with a recovery percentage rate around 100%.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationMachado, Ana, Marshall, Graham, Bordalo, Adriano A., Mesquita, Raquel B. R. - A greener alternative for inline nitrate reduction in the sequential injection determination of NOx in natural waters: replacement of cadmium reduction by UV radiation. Analytical Methods, vol. 9, nº12, (2017) 1876-1884pt_PT
dc.identifier.doi10.1039/c7ay00261kpt_PT
dc.identifier.eid85036463608
dc.identifier.eissn1759-9679
dc.identifier.issn1759-9660
dc.identifier.urihttp://hdl.handle.net/10400.14/23154
dc.identifier.wos000398807500007
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherRoyal Society of Chemistrypt_PT
dc.relationExploring expressly designed ligands to develop expedite flow methods for onboard metal speciation in coastal high energy water systems
dc.titleA greener alternative for inline nitrate reduction in the sequential injection determination of NOx in natural waters: replacement of cadmium reduction by UV radiationpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleExploring expressly designed ligands to develop expedite flow methods for onboard metal speciation in coastal high energy water systems
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/FARH/SFRH%2FBPD%2F112032%2F2015/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FMulti%2F04423%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FMulti%2F50016%2F2013/PT
oaire.citation.titleAnalytical Methodspt_PT
oaire.fundingStreamFARH
oaire.fundingStream5876
oaire.fundingStream5876
person.familyNameMachado
person.familyNameA. Bordalo
person.familyNameMesquita
person.givenNameAna
person.givenNameAdriano
person.givenNameRaquel
person.identifier1484393
person.identifierJ-4630-2013
person.identifier.ciencia-id1514-BAFA-B5B2
person.identifier.ciencia-id8B15-A841-2083
person.identifier.ciencia-idEB1D-DEE3-0B60
person.identifier.orcid0000-0003-0732-1571
person.identifier.orcid0000-0002-9637-6541
person.identifier.orcid0000-0001-7745-1860
person.identifier.ridJ-4630-2013
person.identifier.scopus-author-id56517107800
person.identifier.scopus-author-id7004738492
person.identifier.scopus-author-id7005556626
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
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