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Abstract:

In this work, a non-chromatographic procedure for the on-line determination of ultratraces of V(V) and V(IV) is presented. The method involves a solid phase extraction-flow injection system coupled to electrothermal atomic absorption spectrometry (SPE-FI-ETAAS). The system holds two microcolumns (MC) set in parallel and filled with lab-made mesoporous silica functionalized with 3-aminopropyltriethoxy silane (APS) and mesoporous silica MCM-41, respectively. The pre-concentration of V(V) is performed by sorption onto the first MC (C1) filled with APS at pH 3, whilst that of V(IV) is performed by sorption onto the second column (C2) filled with mesoporous silica MCM-41 at pH 5. Aqueous samples containing both analytes are loaded and, after pre-concentration (pre-concentration factor PCF = 10, sorption flow rate = 1 mL min-1, sorption time = 10 min), they are eluted in separate vessels with hydroxylammonium chloride (HC) 0.1 mol L-1 in HCl 0.5 mol L-1 (elution volume = 1 mL, elution flow rate = 0.5 mL min-1). Afterwards, both analytes are determined through ETAAS with graphite furnace. Under optimized conditions, the main analytical figures of merit for V(V) and V(IV) are, respectively: detection limits (3 s): 0.5 and 0.6 μg L-1, linear range: 2-100 μg L-1 (both analytes), sensitivity: 0.015 and 0.013 μg-1 L and sample throughput: 6 h-1 (both analytes). Recoveries of both species were assayed in different water samples. Validation was performed through certified reference materials for ultratraces of total vanadium in river water. © 2009 Elsevier B.V. All rights reserved.

Registro:

Documento: Artículo
Título:Non-chromatographic determination of ultratraces of V(V) and V(IV) based on a double column solid phase extraction flow injection system coupled to electrothermal atomic absorption spectrometry
Autor:Kim, M.L.; Tudino, M.B.
Filiación:Laboratorio de Análisis de Trazas, Departamento de Química Inorgánica, Analítica y Química Física, INQUIMAE, Pabellon 2, Ciudad Universitaria, 1428 Buenos Aires, Argentina
Palabras clave:Electrothermal atomic absorption spectrometry; Hybrid mesoporous silica; Solid phase extraction; V(IV); V(V); Absorption spectroscopy; Atomic absorption spectrometry; Atoms; Chlorine compounds; Chromatography; Electric heating; Mesoporous materials; Phase separation; Phase shifters; Silica; Sorption; Certified reference materials; Chromatographic determination; Chromatographic procedure; Electrothermal atomic absorption spectrometry; Flow-injection system; Mesoporous Silica; Mesoporous silica MCM-41; Solid-phase extraction; Extraction
Año:2009
Volumen:79
Número:3
Página de inicio:940
Página de fin:946
DOI: http://dx.doi.org/10.1016/j.talanta.2009.05.032
Título revista:Talanta
Título revista abreviado:Talanta
ISSN:00399140
CODEN:TLNTA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00399140_v79_n3_p940_Kim

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Citas:

---------- APA ----------
Kim, M.L. & Tudino, M.B. (2009) . Non-chromatographic determination of ultratraces of V(V) and V(IV) based on a double column solid phase extraction flow injection system coupled to electrothermal atomic absorption spectrometry. Talanta, 79(3), 940-946.
http://dx.doi.org/10.1016/j.talanta.2009.05.032
---------- CHICAGO ----------
Kim, M.L., Tudino, M.B. "Non-chromatographic determination of ultratraces of V(V) and V(IV) based on a double column solid phase extraction flow injection system coupled to electrothermal atomic absorption spectrometry" . Talanta 79, no. 3 (2009) : 940-946.
http://dx.doi.org/10.1016/j.talanta.2009.05.032
---------- MLA ----------
Kim, M.L., Tudino, M.B. "Non-chromatographic determination of ultratraces of V(V) and V(IV) based on a double column solid phase extraction flow injection system coupled to electrothermal atomic absorption spectrometry" . Talanta, vol. 79, no. 3, 2009, pp. 940-946.
http://dx.doi.org/10.1016/j.talanta.2009.05.032
---------- VANCOUVER ----------
Kim, M.L., Tudino, M.B. Non-chromatographic determination of ultratraces of V(V) and V(IV) based on a double column solid phase extraction flow injection system coupled to electrothermal atomic absorption spectrometry. Talanta. 2009;79(3):940-946.
http://dx.doi.org/10.1016/j.talanta.2009.05.032