Szczegóły publikacji
Opis bibliograficzny
Novel voltammetric methods for vanadium determination by exploitation of catalytic adsorptive vanadium-chloranilic acid-bromate system / Andrzej BOBROWSKI, Katarzyna NOWAK, Jerzy ZARĘBSKI // Analytica Chimica Acta ; ISSN 0003-2670. — 2005 — vol. 543 iss. 1–2, s. 150–155. — Bibliogr. s. 155, Abstr. — Publikacja dostępna online od: 2005-05-02
Autorzy (3)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 22965 |
|---|---|
| Data dodania do BaDAP | 2005-07-19 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.aca.2005.03.074 |
| Rok publikacji | 2005 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Analytica Chimica Acta |
Abstract
A new differential pulse polarographic (DPP) and catalytic adsorptive stripping voltammetric (CAdSV) methods for the determination of vanadium(V) have been developed. The CAdSV method is based on the adsorptive accumulation of the vanadium-chloroanilic acid (CAA) complex on the surface of a HMDE and the utilization of the catalytic reaction with BrO3-. The optimal CAdSV vanadium(V) response was obtained in (0.04 divided by 0.2) M acetic buffer at pH 4.5-4.8 in the presence of (2.0 divided by 4.0) x 10(-5) M CAA and (5.0 divided by 10.0) x 10(-3) M KBrO3 with an accumulation potential of (-0.10 divided by -0.15) V and accumulation time of (80 divided by 120)s. The sensitivity of the CAdSV was 42.7 nA nM(-1) and the linearity range amounted from 2 x 10(-10) up to 5 x 10(-8) M for 100 s of accumulation. The R.S.D. was 4.5% at the 1.0 x 10(-9) V(V) level. The detection limits were found to be 2.8 x 10(-9) M for DP polarography and 9 x 10(-12) M for CAdSV with 100 s of accumulation. Possible interferences by Sb(III), Pb(II), Cu(II), Cd(II), Fe(III), Bi(III), Sn(II), Sn(VI), U(VI), Mo(VI) and surface active substances were evaluated. The results of the determination of V(V) in certified reference material water sample showed good reproducibility (R.S.D. = 3.4%) and reliability of the elaborated CAdSV method. (c) 2005 Elsevier B.V. All rights reserved.
