Development of an Automatic Electrochemical System for Differential Pulse Amperometry and Its Application for Se(IV) Determination

• Published in: Electroanalysis (New York, N.Y.) Vol. 17; no. 22; pp. 2084 - 2089
• Main Authors: Gonzaga, Fabiano Barbieri, Pereira, Claudete Fernandes, Guaritá-Santos, Antonio José Moraes, Souza De, Jurandir Rodrigues
• Format: Journal Article
• Language: English
• Published: Weinheim WILEY-VCH Verlag 01.11.2005; WILEY‐VCH Verlag
• Subjects: Data acquisition; Differential pulse amperometry; Gold electrode; Instrumentation; Selenium determination
• ISSN: 1040-0397; 1521-4109
• DOI: 10.1002/elan.200503338

This work presents the development of an automatic system for differential pulse amperometry (DPA) with electrochemical deposition. The system consists of a microcomputer, running a home‐made software, connected to a commercial potentiostat through a data acquisition board. The system was applied for selenium determination using gold electrode and flow injection analysis (FIA). Analytical curves were obtained in the concentration range of 20 to 400 μg L−1 for Se(IV), with a calculated detection limit of 6 μg L−1. The analysis results for fish samples doped with Se(IV) and digested in a microwave oven showed recoveries above 93%.