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dc.contributor.authorMoraes, Sandra Valéria Mendes dept_BR
dc.contributor.authorTissot, Mateus Marquespt_BR
dc.contributor.authorMilcharek, Caroline D.pt_BR
dc.contributor.authorBrasil, Jorge de Limapt_BR
dc.contributor.authorCosta, Tania Maria Haaspt_BR
dc.contributor.authorGallas, Marcia Russmanpt_BR
dc.contributor.authorBenvenutti, Edilson Valmirpt_BR
dc.contributor.authorLima, Éder Cláudiopt_BR
dc.date.accessioned2020-02-28T04:05:46Zpt_BR
dc.date.issued2005pt_BR
dc.identifier.issn1348-2246pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/206298pt_BR
dc.description.abstractA new sorbent was synthesized by anchoring 7-amino-4-azaheptyltrimetoxisilane, freshly prepared, to silica gel, producing 7-amino-4-azaheptyl anchored silica gel (AAHSG). This material was characterized by infrared spectroscopy (IR), elemental analysis (CHN), and nitrogen adsorption-desorption isotherms. Isotherms of the adsorption of Fe3+, Fe2+ and Cu2+ on AAHSG were recorded, which indicated that Fe3+ presents a higher affinity by the sorbent. Therefore, AAHSG was successfully employed as a sorbent in a simple flow system for the preconcentration of Fe3+ in natural water samples, such as, river water, lagoonwater, springwater, stream water, well water and two water reference materials (NIST-SRM 1640, NIST-SRM 1643d). The obtained preconcentration factor was 82.2, and the detection limit achieved was 5.9 ng ml-1. The recovery of spiked water samples ranged from 95.0 - 103.1%.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofAnalytical sciences. Tokyo. Vol. 21, no. 5 (May 2005), p. 573-577pt_BR
dc.rightsOpen Accessen
dc.subjectGel de sílica : Síntesept_BR
dc.title7-amino-4-azaheptyl grafted onto a silica gel as a sorbent for the on-line preconcentration and determination of iron(III) in water samplespt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000466721pt_BR
dc.type.originEstrangeiropt_BR


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