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Abstract:

An automatic separation preconcentration system coupled to an electrothermal (graphite furnace) atomic absorption spectrometer is described. The preconcentration step is performed on a chelating resin microcolumn (Chelex-100) placed in the injection tip of the autosampler. A time based manifold with two- and three-way solenoid valves commanded by an eight channel microcomputer programmable controller is used for column conditioning, preconcentration and washing steps; no manual operations are involved. Elution is performed by the programmable graphite furnace autosampler and achieved in only one step. Operations involving complete and partial injection of the eluate into the graphite furnace are also discussed. The system was applied to the determination of Cd and Pb in near shore sea-water from Patagonia, Argentina. Detection limits of 1 and 8 ng 1-1 were obtained for Cd and Pb respectively. Analysis of a certified reference material (CASS-3) showed good agreement with the certified values.

Registro:

Documento: Artículo
Título:Fully automatic on-line separation preconcentration system for electrothermal atomic absorption spectrometry: Determination of cadmium and lead in sea-water
Autor:Fernández, F.M.; Stripeikis, J.D.; Tudino, M.B.; Troccoli, O.E.
Filiación:Laboratorio de Análisis de Trazas, Departamento de Química Inorgánica, Analítica y Química Fisica, Ciudad Universitaria, (1428), Buenos Aires, Argentina
Palabras clave:Cadmium; Electrothermal atomic absorption spectrometry; Flow injection; Lead; Sea-water; cadmium; chelating agent; heavy metal; lead; sea water; analytic method; argentina; article; atomic absorption spectrometry; autoanalysis; chelation; controlled study; flow injection analysis; microcomputer; standard; water analysis; Automatic Data Processing; Cadmium; Lead; Seawater; Sensitivity and Specificity; Spectrophotometry, Atomic
Año:1997
Volumen:122
Número:7
Página de inicio:679
Página de fin:684
DOI: http://dx.doi.org/10.1039/a607598c
Título revista:Analyst
Título revista abreviado:ANALYST
ISSN:00032654
CODEN:ANALA
CAS:Cadmium, 7440-43-9; Lead, 7439-92-1
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00032654_v122_n7_p679_Fernandez

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Citas:

---------- APA ----------
Fernández, F.M., Stripeikis, J.D., Tudino, M.B. & Troccoli, O.E. (1997) . Fully automatic on-line separation preconcentration system for electrothermal atomic absorption spectrometry: Determination of cadmium and lead in sea-water. Analyst, 122(7), 679-684.
http://dx.doi.org/10.1039/a607598c
---------- CHICAGO ----------
Fernández, F.M., Stripeikis, J.D., Tudino, M.B., Troccoli, O.E. "Fully automatic on-line separation preconcentration system for electrothermal atomic absorption spectrometry: Determination of cadmium and lead in sea-water" . Analyst 122, no. 7 (1997) : 679-684.
http://dx.doi.org/10.1039/a607598c
---------- MLA ----------
Fernández, F.M., Stripeikis, J.D., Tudino, M.B., Troccoli, O.E. "Fully automatic on-line separation preconcentration system for electrothermal atomic absorption spectrometry: Determination of cadmium and lead in sea-water" . Analyst, vol. 122, no. 7, 1997, pp. 679-684.
http://dx.doi.org/10.1039/a607598c
---------- VANCOUVER ----------
Fernández, F.M., Stripeikis, J.D., Tudino, M.B., Troccoli, O.E. Fully automatic on-line separation preconcentration system for electrothermal atomic absorption spectrometry: Determination of cadmium and lead in sea-water. ANALYST. 1997;122(7):679-684.
http://dx.doi.org/10.1039/a607598c