title: Determination of Se(IV) by anodic stripping voltammetry using gold electrodes made from recordable CDs.
abstract: This work presents a simple, reproducible and low cost method, employing differential pulse anodic stripping voltammetry, for determination of selenium(IV). A gold electrode obtained from recordable compact disks (CD-R) was used to evaluate the voltammetric behavior of the metallic ion in 0.1molL(-1) HClO(4). To evaluate the voltammetric behavior of Se(IV), parameters such as deposition potential and deposition time were optimized. A wide linear response range, from 0.5 to 291ngmL(-1), was obtained using a 5.0mm diameter gold electrode. Recovery tests for Se(IV) utilizing standard reference solutions provided values between 94 and 96%.
authors.affiliation: Universidade de Brasília, Instituto de Química, Laboratório de Química Analítica e Ambiental, Campus Darcy Ribeiro, P.O. Box 4478, 70919-970 Brasília, DF, Brazil.
authors.forename: Claudete Fernandes
authors.initials: CF
authors.lastname: Pereira
authors.forename: Fabiano Barbieri
authors.initials: FB
authors.lastname: Gonzaga
authors.forename: Antonio Moraes
authors.initials: AM
authors.lastname: Guaritá-Santos
authors.forename: Jurandir Rodrigues
authors.initials: JR
authors.lastname: Souzade