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Abstract:

In this paper, two time-based flow injection (FI) separation pre-concentration systems coupled to graphite furnace atomic absorption spectrometry (GFAAS) for tellurium determination are studied and compared. The first alternative involves the pre-concentration of the analyte onto Dowex 1X8 employed as packaging material of a micro-column inserted in the flow system. The second set-up is based on the co-precipitation of tellurium with La(OH)3 followed by retention onto XAD resins. Both systems are compared in terms of limit of detection, linear range, RSD%, sample throughput, micro-columns lifetime and aptitude for fully automatic operation. The features of the Dowex system are: 37% efficiency of retention and an enhancement factor of 42 for a pre-concentration time of 180 seconds (sample flow rate = 3 ml min- 1) with acetic acid elution volumes of 80 μl. The detection limit (3 s) is 7 ng l- 1 and the relative standard deviation (n = 7200 ng l- 1) is 5.8%. The analytical performance of the XAD system is: 72% efficiency of retention and an enhancement factor of 25 for a pre-concentration time of 180 s (sample flow rate = 3 ml min- 1) with nitric acid elution volumes of 300 μl. The detection limit is 66 ng l- 1 and the relative standard deviation (n = 7200 ng l- 1) is 8.3%. Applications to the determination of tellurium in tap water and the validation of the analytical methodology employing SRM 1643e as certified reference material are shown. © 2007 Elsevier B.V. All rights reserved.

Registro:

Documento: Artículo
Título:Determination of tellurium at ultra-trace levels in drinking water by on-line solid phase extraction coupled to graphite furnace atomic absorption spectrometer
Autor:Pedro, J.; Stripekis, J.; Bonivardi, A.; Tudino, M.
Filiación:Area de Química Analítica, Departamento de Química, Facultad de Ingeniería Química, Santiago del Estero 2829 (S3000GL.N), Santa Fe, Argentina
Laboratorio de Análisis de Trazas, Departamento de Química Inorgánica, Analítica y Química Física, INQUIMAE, Ciudad Universitaria, (1428), Buenos Aires, Argentina
Palabras clave:Electrothermal atomic absorption spectrometry; Flow injection; On-line solid phase extraction; Tellurium determination; Atomic absorption spectrometry; Flow separation; Graphite; Potable water; Resins; Electrothermal atomic absorption spectrometry; Flow injection; On-line solid phase extraction; Tellurium determination; Tellurium compounds
Año:2008
Volumen:63
Número:1
Página de inicio:86
Página de fin:91
DOI: http://dx.doi.org/10.1016/j.sab.2007.11.011
Título revista:Spectrochimica Acta - Part B Atomic Spectroscopy
Título revista abreviado:Spectrochim. Acta Part B At. Spectrosc.
ISSN:05848547
CODEN:SAASB
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05848547_v63_n1_p86_Pedro

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Citas:

---------- APA ----------
Pedro, J., Stripekis, J., Bonivardi, A. & Tudino, M. (2008) . Determination of tellurium at ultra-trace levels in drinking water by on-line solid phase extraction coupled to graphite furnace atomic absorption spectrometer. Spectrochimica Acta - Part B Atomic Spectroscopy, 63(1), 86-91.
http://dx.doi.org/10.1016/j.sab.2007.11.011
---------- CHICAGO ----------
Pedro, J., Stripekis, J., Bonivardi, A., Tudino, M. "Determination of tellurium at ultra-trace levels in drinking water by on-line solid phase extraction coupled to graphite furnace atomic absorption spectrometer" . Spectrochimica Acta - Part B Atomic Spectroscopy 63, no. 1 (2008) : 86-91.
http://dx.doi.org/10.1016/j.sab.2007.11.011
---------- MLA ----------
Pedro, J., Stripekis, J., Bonivardi, A., Tudino, M. "Determination of tellurium at ultra-trace levels in drinking water by on-line solid phase extraction coupled to graphite furnace atomic absorption spectrometer" . Spectrochimica Acta - Part B Atomic Spectroscopy, vol. 63, no. 1, 2008, pp. 86-91.
http://dx.doi.org/10.1016/j.sab.2007.11.011
---------- VANCOUVER ----------
Pedro, J., Stripekis, J., Bonivardi, A., Tudino, M. Determination of tellurium at ultra-trace levels in drinking water by on-line solid phase extraction coupled to graphite furnace atomic absorption spectrometer. Spectrochim. Acta Part B At. Spectrosc. 2008;63(1):86-91.
http://dx.doi.org/10.1016/j.sab.2007.11.011