Determination of Mg (II) in biodiesel by adsorptive stripping voltammetry at a mercury film electrode in the presence of sodium thiopentone

• Autor(a) principal: Zezza, Tina R. C. [UNESP]
• Data de Publicação: 2013
• Outros Autores: Paim, Leonardo L. [UNESP], Stradiotto, Nelson Ramos [UNESP]
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://www.electrochemsci.org/papers/vol8/80100658.pdf; http://hdl.handle.net/11449/74093
• topic: Adsorptive stripping voltammetry; Biodiesel; Mercury film electrode; Mg (II) determination; Sodium thiopentone

A mercury film electrode was used to determine Mg (II) in biodiesel by adsorptive stripping voltammetry in presence of sodium thiopentone. A linear response was obtained for Mg (II) in the concentration range of 6.0 × 10-7 to 7.0 × 10-6 mol L-1 for SWAdSV and 8.0 × 10-7 to 9.0 × 10-6 mol L-1 for DPAdSV with detection limits of the 2.9 × 10-7 mol L-1 and 3.1 × 10-7 mol L-1, respectively. The method was applied successfully to biodiesel samples and presented goods results of accuracy with recoveries close to 100.0 % for SWAdSV and DPAdSV. © 2013 by ESG.