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Abstract:

The ultratrace determination of Cd species in natural waters by using an automatic on-line extraction preconcentration system coupled to a graphite furnace atomic absorption spectrometer is presented. Two operational fractions with environmental meaning (able and not able to be accumulated by aquatic organisms) were determined through kinetic discrimination; a Chelex-100 labile fraction consisting of Cd ions and weak Cd complexes and a silica C18 hydrophobic inert fraction consisting of stable cadmium-organic complexes. The figures of merit for the determination of both fractions are given and the obtained values are fully discussed. The aptitude of different resins for the extraction of each fraction is evaluated taking into account retention capacity, pre-concentration efficiency, ease of elution, type of eluant (i.e., compatible with the graphite furnace operation) and the sample-resin time of contact. Special attention is given to the characterization of humic acids and their Cd complexes and to their sorption and elution capabilities from different extracting materials.

Registro:

Documento: Artículo
Título:Automatic on-line ultratrace determination of Cd species of environmental significance in natural waters by FI-ETAAS
Autor:Fernández, F.M.; Tudino, M.B.; Troccoli, O.E.
Ciudad:Cambridge, United Kingdom
Filiación:Lab. de Análisis de Trazas, Depto. de Quimica Inorganica, Ciudad Universitaria (1428), Buenos Aires, Argentina
Palabras clave:Absorption spectroscopy; Cadmium; Extraction; Online systems; Reaction kinetics; Water; Absorption atomic spectrometry; Automatic online ultratrace determination; Dissolved organic matter; Flow injection electrothermal atomization; Trace analysis
Año:2000
Volumen:15
Número:6
Página de inicio:687
Página de fin:695
DOI: http://dx.doi.org/10.1039/b000810i
Título revista:Journal of analytical atomic spectrometry
Título revista abreviado:J Anal At Spectrom
ISSN:02679477
CODEN:JASPE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02679477_v15_n6_p687_Fernandez

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Citas:

---------- APA ----------
Fernández, F.M., Tudino, M.B. & Troccoli, O.E. (2000) . Automatic on-line ultratrace determination of Cd species of environmental significance in natural waters by FI-ETAAS. Journal of analytical atomic spectrometry, 15(6), 687-695.
http://dx.doi.org/10.1039/b000810i
---------- CHICAGO ----------
Fernández, F.M., Tudino, M.B., Troccoli, O.E. "Automatic on-line ultratrace determination of Cd species of environmental significance in natural waters by FI-ETAAS" . Journal of analytical atomic spectrometry 15, no. 6 (2000) : 687-695.
http://dx.doi.org/10.1039/b000810i
---------- MLA ----------
Fernández, F.M., Tudino, M.B., Troccoli, O.E. "Automatic on-line ultratrace determination of Cd species of environmental significance in natural waters by FI-ETAAS" . Journal of analytical atomic spectrometry, vol. 15, no. 6, 2000, pp. 687-695.
http://dx.doi.org/10.1039/b000810i
---------- VANCOUVER ----------
Fernández, F.M., Tudino, M.B., Troccoli, O.E. Automatic on-line ultratrace determination of Cd species of environmental significance in natural waters by FI-ETAAS. J Anal At Spectrom. 2000;15(6):687-695.
http://dx.doi.org/10.1039/b000810i