Inexpensive and disposable copper mini-sensor modified with bismuth for lead and cadmium determination using square-wave anodic stripping voltammetry

Autor(es)

Figueiredo-Filho, Luiz Carlos S. ^[1] ; Janegitz, Bruno C. ^[1] ; Fatibello-Filho, Orlando ^[1] ; Marcolino-Junior, Luiz Humberto ^[2] ; Banks, Craig E. ^[3]

Afiliação do(s) autor(es)

^[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

^[3] Manchester Metropolitan Univ, Div Chem & Environm, Sch Chem & Environm, Fac Sci & Engn, Manchester M1 5GD, Lancs - England

• Tipo de documento: Artigo Científico
• Fonte: ANALYTICAL METHODS; v. 5, n. 1, p. 202-207, 2013.
• Citações Web of Science: 35

Resumo

The fabrication and evaluation of a disposable copper mini-sensor ex situ modified bismuth film for the sensing of lead(II) and cadmium(II) via square-wave anodic stripping voltammetry (SWASV) is presented. The sensor was ex situ modified with a bismuth film via electro-deposition through applying a potential of -0.18 V vs. Ag/AgCl (3.0 mol L-1 KCl) for 200 seconds in a 0.02 mol L-1 Bi(NO3)(3), 0.15 mol L-1 sodium citrate in 1.5 mol L-1 HCl solution. Under the optimal experimental conditions, the voltammetric response was linearly dependent on the analyte concentrations over the range from 1.3 x 10(-6) to 1.3 x 10(-5) mol L-1 and from 9.9 x 10(-7) to 1.2 x 10(-5) mol L-1 with a limit of detection of 8.3 x 10(-7) mol L-1 and 5.3 x 10(-7) mol L-1 for Pb(II) and Cd(II), respectively. The determination of both toxic metallic species was carried out in natural waters using the sensor obtaining results which are in close agreement with those obtained using Flame Atomic Absorption Spectrometry at a 95% confidence level. (AU)

• Processo FAPESP: 10/20754-1 - Desenvolvimento de sensores eletroquímicos utilizando nanomateriais para a determinação de espécies de interesse farmacêutico e ambiental
• Beneficiário: Luiz Carlos Soares de Figueiredo Filho
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 08/07529-9 - Desenvolvimento de mini-sensores de filme de bismuto para a determinação voltamétrica in situ de paraquat e atrazina em águas naturais
• Beneficiário: Luiz Carlos Soares de Figueiredo Filho
• Modalidade de apoio: Bolsas no Brasil - Mestrado