Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/46354
DC FieldValueLanguage
dc.contributor.authorHerrera-Melián, J. A.en_US
dc.contributor.authorHernández-Brito, J.en_US
dc.contributor.authorGelado-Caballero, M. D.en_US
dc.contributor.authorPérez-Peña, J.en_US
dc.date.accessioned2018-11-23T03:47:12Z-
dc.date.available2018-11-23T03:47:12Z-
dc.date.issued1994en_US
dc.identifier.issn0003-2670en_US
dc.identifier.urihttp://hdl.handle.net/10553/46354-
dc.description.abstractA fast, sensitive method to determine Co (II) in unpurged ocean seawater is presented. The method combines high scan speed staircase voltammetry (HSACSV) and nitrite catalytic effect to enhance Co(II)-dimethylglyoxime reduction currents. The catalytic effect was magnified using high speed adsorptive cathodic stripping voltammetry and peak currents of ca. 0.1 μA were obtained for pM cobalt samples using 30-s deposition times. The effect of buffer, pH, nitrite concentration and scan speed on cobalt sensitivity was studied. Capacitance currents developed at high scan speeds were filtered by background subtraction. The same procedure was successfully applied to remove oxygen interference in unpurged solutions. Blank voltammograms were obtained in different ways yielding similar results without variation in peak reproducibility or accuracy. Nickel and zinc interferences were removed using a cleaning potential before the scan at −1.03 V. Ratios over 10 000 fold were eliminated using more negative cleaning potential steps. Nickel can also be measured by this method. Total analysis time of unpurged seawater (pM levels of cobalt) was decreased to reagents addition time, 30-s adsorption period and 10-s quiescence time. A detection limit of 5.9 pM Co was achieved in seawater. Short analysis time, sensitivity and portable hardware recommend this method for aboard determinations of cobalt. An oceanic profile of cobalt was measured at the Central East Atlantic Ocean.en_US
dc.languageengen_US
dc.publisher0003-2670-
dc.relation.ispartofAnalytica chimica acta (Print)en_US
dc.sourceAnalytica Chimica Acta [ISSN 0003-2670], v. 299, p. 59-67en_US
dc.subject230331 Química del aguaen_US
dc.subject.otherStripping voltammetryen_US
dc.subject.otherCathodic stripping voltammetryen_US
dc.subject.otherCobalten_US
dc.subject.otherNickelen_US
dc.subject.otherSeawateren_US
dc.subject.otherWatersen_US
dc.titleDirect determination of cobalt in unpurged oceanic seawater by high speed adsorptive cathodic stripping voltammetryen_US
dc.typeinfo:eu-repo/semantics/Articlees
dc.typeArticlees
dc.identifier.doi10.1016/0003-2670(94)00397-1
dc.identifier.scopus0028567785-
dc.identifier.isiA1994QA05300007
dc.contributor.authorscopusid55666370900-
dc.contributor.authorscopusid35614212100-
dc.contributor.authorscopusid6506058559-
dc.contributor.authorscopusid7004839316-
dc.description.lastpage67-
dc.description.firstpage59-
dc.relation.volume299-
dc.investigacionCienciasen_US
dc.type2Artículoen_US
dc.contributor.daisngid5556548
dc.contributor.daisngid1860348
dc.contributor.daisngid2134468
dc.contributor.daisngid1479300
dc.contributor.wosstandardWOS:HERRERAMELIAN, JA
dc.contributor.wosstandardWOS:HERNANDEZBRITO, J
dc.contributor.wosstandardWOS:GELADOCABALLERO, MD
dc.contributor.wosstandardWOS:PEREZPENA, J
dc.date.coverdateDiciembre 1994
dc.identifier.ulpgces
dc.description.scieSCIE
item.fulltextSin texto completo-
item.grantfulltextnone-
crisitem.author.deptFotocatálisis y espectroscopía para aplicaciones medioambientales. Unidad asociada al CSIC a través del Instituto de Ciencias de Materiales de Sevilla-
crisitem.author.deptIU de Estudios Ambientales y Recursos Naturales-
crisitem.author.deptQuímica-
crisitem.author.deptTecnologias, gestión y biogeoquímica ambiental-
crisitem.author.deptQuímica-
crisitem.author.deptFotocatálisis y espectroscopía para aplicaciones medioambientales. Unidad asociada al CSIC a través del Instituto de Ciencias de Materiales de Sevilla-
crisitem.author.deptIU de Estudios Ambientales y Recursos Naturales-
crisitem.author.deptQuímica-
crisitem.author.orcid0000-0002-5305-1667-
crisitem.author.orcid0000-0003-4001-9673-
crisitem.author.orcid0000-0003-1889-2281-
crisitem.author.parentorgIU de Estudios Ambientales y Recursos Naturales-
crisitem.author.parentorgQuímica-
crisitem.author.parentorgIU de Estudios Ambientales y Recursos Naturales-
crisitem.author.fullNameHerrera Melián, José Alberto-
crisitem.author.fullNameHernández Brito, José Joaquín-
crisitem.author.fullNameGelado Caballero, María Dolores-
crisitem.author.fullNamePérez Peña, Jesús-
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