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7-amino-4-azaheptyl grafted onto a silica gel as a sorbent for the on-line preconcentration and determination of iron(III) in water samples
dc.contributor.author | Moraes, Sandra Valéria Mendes de | pt_BR |
dc.contributor.author | Tissot, Mateus Marques | pt_BR |
dc.contributor.author | Milcharek, Caroline D. | pt_BR |
dc.contributor.author | Brasil, Jorge de Lima | pt_BR |
dc.contributor.author | Costa, Tania Maria Haas | pt_BR |
dc.contributor.author | Gallas, Marcia Russman | pt_BR |
dc.contributor.author | Benvenutti, Edilson Valmir | pt_BR |
dc.contributor.author | Lima, Éder Cláudio | pt_BR |
dc.date.accessioned | 2020-02-28T04:05:46Z | pt_BR |
dc.date.issued | 2005 | pt_BR |
dc.identifier.issn | 1348-2246 | pt_BR |
dc.identifier.uri | http://hdl.handle.net/10183/206298 | pt_BR |
dc.description.abstract | A 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.mimetype | application/pdf | pt_BR |
dc.language.iso | eng | pt_BR |
dc.relation.ispartof | Analytical sciences. Tokyo. Vol. 21, no. 5 (May 2005), p. 573-577 | pt_BR |
dc.rights | Open Access | en |
dc.subject | Gel de sílica : Síntese | pt_BR |
dc.title | 7-amino-4-azaheptyl grafted onto a silica gel as a sorbent for the on-line preconcentration and determination of iron(III) in water samples | pt_BR |
dc.type | Artigo de periódico | pt_BR |
dc.identifier.nrb | 000466721 | pt_BR |
dc.type.origin | Estrangeiro | pt_BR |
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