Differential Pulse Voltammetric Determination of Paraquat Using a Bismuth-Film Electrode

Author(s)

de Figueiredo-Filho, Luiz Carlos S. ^[1] ; dos Santos, Vagner B. ^[1] ; Janegitz, Bruno Campos ^[1] ; Guerreiro, Thiago Brito ^[1] ; Fatibello-Filho, Orlando ^[1] ; Faria, Ronald Censi ^[1] ; Marcolino-Junior, Luiz Humberto ^[2]

Affiliation

^[1] Univ Fed Sao Carlos, Dept Quim, Ctr Ciencias Exatas & Tecnol, BR-13560970 Sao Carlos, SP - Brazil

^[2] Univ Fed Parana, Dept Quim, BR-81531990 Curitiba, Parana - Brazil

• Document type: Journal article
• Source: Electroanalysis; v. 22, n. 11, p. 1260-1266, JUN 2010.
• Web of Science Citations: 43

Abstract

A bismuth-film electrode (BiFE) ex situ electrochemically deposited onto a copper substrate has been presented for paraquat determination. The bismuth film was electrochemically deposited at an applied potential of 0.18 V vs. Ag/AgCl (3.0 M KCl) for 200 s. The analytical curve was linear in the paraquat concentration range from 6.6 x 10(-7) M to 4.8 x 10(-5) M with a limit of detection of 9.3 x 10(-8) M. The method presented satisfactory results at a confidence level of 95% and the performance was evaluated in water samples. (AU)

• FAPESP's process: 07/08365-7 - Development, characterization and analytical application of the modified electrodes with carbon nanotubes and reticulated quitosan
• Grantee: Ronaldo Censi Faria
• Support Opportunities: Regular Research Grants
• FAPESP's process: 08/07529-9 - Development of mini-sensor of bismuth film for the in situ voltammetric determination of paraquat and atrazina in natural waters
• Grantee: Luiz Carlos Soares de Figueiredo Filho
• Support Opportunities: Scholarships in Brazil - Master