Szczegóły publikacji
Opis bibliograficzny
Catalytic voltammetric determination of Mo(VI) ultratraces at the tellurium film electrode using the $Mo(VI)-mandelic$ acid-chlorate system / Andrzej BOBROWSKI, Agnieszka KRÓLICKA, Julia ŚLIWA, Jerzy ZARĘBSKI // Electrochimica Acta : Journal of the International Society of Electrochemistry ; ISSN 0013-4686. — 2019 — vol. 297, s. 814–819. — Bibliogr. s. 818–819, Abstr. — Publikacja dostępna online od: 2018-12-03
Autorzy (4)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 120057 |
|---|---|
| Data dodania do BaDAP | 2019-03-25 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.electacta.2018.12.016 |
| Rok publikacji | 2019 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Electrochimica Acta |
Abstract
An in-situ plated tellurium film electrode at the glassy carbon substrate (TeF-GCE) was applied for a sensitive catalytic voltammetric determination of molybdenum in the presence of 0.08 mM of mandelic acid (HA), 0.1 M of KClO3, 0.01 M of HCl and 150 mu g L-1 of Te(IV). The performed cyclic and square-wave voltammetric measurements indicate that the investigated catalytic system at the TeF-GCE involves electrocatalysis of the second kind, in which a composite complex between the catalyst Mo(V)-A and ClO3- ions forms, and the subsequent irreversible electrochemical reaction yields the catalyst and electroinactive ClO2- ions. The applied analytical procedure was based on 120 s of deposition of Te film at similar to 0.6 V, followed by differential pulse polarization of the electrode from 0 V to similar to 0.6 V. The sensitivity of the method was 4.02 mu A/(mu g L-1) and the catalytic voltammetric response was proportional to the concentration of molybdenum within the range from 0.02 to 0.14 mu g L-1. The limit of detection was found to be 0.004 mu g L-1 of Mo(VI), which makes the catalytic voltammetric method suitable for the quantification of Mo ultratraces in surface waters.
