Application of multi-walled carbon nanotubes as substrate for the on-line preconcentration, speciation and determination of vanadium by ETAAS

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This paper presents the development of a pre-concentration and speciation method for inorganic vanadium species by flow injection solid phase extraction-electrothermal atomic absorption spectrometry (FI-SPE-ETAAS). This was carried out by employing a conical mini-column filled with multi-walled carb...

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Autor principal: Gil, R.A
Otros Autores: Goyanes, Silvia Nair, Polla, G., Smichowski, P., Olsina, R.A, Martinez, L.D
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: 2007
Acceso en línea:Registro en Scopus
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Biblioteca Central Dr. Luis F. Leloir (FCEN) de Universidad de Buenos Aires
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030 |a JASPE 
040 |a Scopus  |b spa  |c AR-BaUEN  |d AR-BaUEN 
100 1 |a Gil, R.A. 
245 1 0 |a Application of multi-walled carbon nanotubes as substrate for the on-line preconcentration, speciation and determination of vanadium by ETAAS 
260 |c 2007 
270 1 0 |m Martinez, L.D.; Área de Química Analítica, Departamento de Química, Unuiversidad Nacional de San Luis, Chacabuco y Pedernera, San Luis 5700, Argentina; email: ldm@unsl.edu.ar 
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506 |2 openaire  |e Política editorial 
520 3 |a This paper presents the development of a pre-concentration and speciation method for inorganic vanadium species by flow injection solid phase extraction-electrothermal atomic absorption spectrometry (FI-SPE-ETAAS). This was carried out by employing a conical mini-column filled with multi-walled carbon nanotubes mounted in the arm of the autosampler of the ETAAS. This system was applied to the on-line pre-concentration and speciation of vanadium in natural waters in conjunction with ETAAS determination. The time required for the pre-concentration of 1.0 ml of sample (1.0 ml min-1), elution/injection (0.2 ml min-1), reading/data acquiring and conditioning was about 2.9 min, resulting in a sample throughput of 20 samples per hour. A 20-fold total enrichment factor for a sample volume of 1.0 ml was obtained with respect to the vanadium determination by ETAAS without pre-concentration. The relative standard deviation for six replicates containing 200 ng l-1 was 3.3%. A limit of detection (3s) of 19 ng l -1 was achieved and the limit of quantification was estimated (10s), obtaining a characteristic concentration of 63 ng l-1. The calibration curve was linear from the quantification limit up to 1500 ng l -1, with a correlation coefficient of 0.9996. This method permitted us to determine the total inorganic vanadium in natural waters. For speciation purposes, V(iv) was masked with 1,2 cyclohexanediaminetetraacetic acid (CDTA) in order to determine the V(v) concentration selectively. © The Royal Society of Chemistry.  |l eng 
593 |a Área de Química Analítica, Departamento de Química, Unuiversidad Nacional de San Luis, Chacabuco y Pedernera, San Luis 5700, Argentina 
593 |a Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina 
593 |a Laboratorio de Polímeros y Materiales Compuestos, Departamento de Física, Ciudad Autónoma de Buenos, Buenos Aires 1428, Argentina 
593 |a Comisión Nacional de Energía Atómica, Unidad de Actividad Física, Av. General Paz 1499, San Martin-Buenos Aires B1650KNA, Argentina 
593 |a Comisión Nacional de Energía Atómica, Unidad de Actividad Química, Av. Gral Paz 1499, San Martin-Buenos Aires B1650KNA, Argentina 
690 1 0 |a ATOMIC ABSORPTION SPECTROMETRY 
690 1 0 |a CONCENTRATION (PROCESS) 
690 1 0 |a DATA ACQUISITION 
690 1 0 |a EXTRACTION 
690 1 0 |a GROUNDWATER 
690 1 0 |a SUBSTRATES 
690 1 0 |a VANADIUM 
690 1 0 |a FLOW INJECTION SOLID PHASE EXTRACTION-ELECTROTHERMAL ATOMIC ABSORPTION SPECTROMETRY (FI-SPE-ETAAS) 
690 1 0 |a ON-LINE PRECONCENTRATION 
690 1 0 |a SPECIATION 
690 1 0 |a MULTIWALLED CARBON NANOTUBES (MWCN) 
700 1 |a Goyanes, Silvia Nair 
700 1 |a Polla, G. 
700 1 |a Smichowski, P. 
700 1 |a Olsina, R.A. 
700 1 |a Martinez, L.D. 
773 0 |d 2007  |g v. 22  |h pp. 1290-1295  |k n. 10  |p J Anal At Spectrom  |x 02679477  |w (AR-BaUEN)CENRE-601  |t Journal of Analytical Atomic Spectrometry 
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856 4 0 |u https://doi.org/10.1039/b700846e  |y DOI 
856 4 0 |u https://hdl.handle.net/20.500.12110/paper_02679477_v22_n10_p1290_Gil  |y Handle 
856 4 0 |u https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02679477_v22_n10_p1290_Gil  |y Registro en la Biblioteca Digital 
961 |a paper_02679477_v22_n10_p1290_Gil  |b paper  |c PE 
962 |a info:eu-repo/semantics/article  |a info:ar-repo/semantics/artículo  |b info:eu-repo/semantics/publishedVersion 
999 |c 83532 

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