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Flow injection spectrophotometric determination of V(V) involving on-line separation using a poly(vinylidene fluoride-co-hexafluoropropylene)-based polymer inclusion membrane.
Yaftian, Mohammad Reza; Almeida, M Inês G S; Cattrall, Robert W; Kolev, Spas D.
Afiliación
  • Yaftian MR; Department of Chemistry, Faculty of Science, The University of Zanjan, 45371-38791 Zanjan, Iran; School of Chemistry, The University of Melbourne, Victoria 3010, Australia.
  • Almeida MIGS; School of Chemistry, The University of Melbourne, Victoria 3010, Australia.
  • Cattrall RW; School of Chemistry, The University of Melbourne, Victoria 3010, Australia.
  • Kolev SD; School of Chemistry, The University of Melbourne, Victoria 3010, Australia. Electronic address: s.kolev@unimelb.edu.au.
Talanta ; 181: 385-391, 2018 May 01.
Article en En | MEDLINE | ID: mdl-29426530
A poly(vinylidene fluoride-co-hexafluoropropylene)-based polymer inclusion membrane (PIM) using Cyphos® IL 101 (i.e. trihexyl(tetradecyl)phosphonium chloride) as the carrier and 2-nitrophenyl octyl ether as a plasticizer in a mass ratio of 55/35/10 was employed for the on-line extractive separation of V(V) prior to its spectrophotometric determination in a flow injection analysis (FIA) system using xylenol orange as the colorimetric reagent. The selectivity of the membrane allowed the determination of V(V) in sulfate solutions in the presence of a variety of cations and anions. The interference of molybdenum(VI) was eliminated by off-line extraction using the same PIM. A univariate sequential optimization of the newly developed FIA system was conducted and under optimal conditions the system is characterized by a linear concentration range of 0.5-8.0mgL-1, detection limit of 0.08mgL-1 and sample throughput of 4h-1. The relative standard deviation at the 3mgL-1 level of V(V) was 2.9% based on 8 replicate determinations. The membrane was stable, which was reflected by the standard deviation value for determinations over three consecutive days (24 determinations of 3mgL-1 V(V)) of 3.6%. The newly developed FIA system was applied to the determination of V(V) in water and dietary supplements samples and a good agreement with inductively coupled plasma optical emission spectrometry was observed.
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Texto completo: 1 Bases de datos: MEDLINE Asunto principal: Polímeros / Espectrofotometría / Vanadio / Análisis de Inyección de Flujo / Membranas Artificiales Idioma: En Revista: Talanta Año: 2018 Tipo del documento: Article País de afiliación: Australia

Texto completo: 1 Bases de datos: MEDLINE Asunto principal: Polímeros / Espectrofotometría / Vanadio / Análisis de Inyección de Flujo / Membranas Artificiales Idioma: En Revista: Talanta Año: 2018 Tipo del documento: Article País de afiliación: Australia