Studies of the effects of metallic ions aluminum (III), lead (II), copper (II), iron (II)/ (III), manganese (II) and nickel (II) on peroxyoxalate chemiluminescent with hydrogen peroxide and prospects of their analytical applications

• Grant number: 09/08120-0
• Support type: Regular Research Grants
• Duration: February 01, 2010 - January 31, 2013
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Analytical Chemistry
• Principal researcher: Patrícia Dantoni Alnis Bezerra
• Grantee: Patrícia Dantoni Alnis Bezerra
• Home Institution: Centro de Ciências Naturais e Humanas (CCNH). Universidade Federal do ABC (UFABC). Ministério da Educação (Brasil). Santo André , SP, Brazil

Abstract

The peroxyoxalate chemiluminescent reaction is a type of reaction activated by the Chemically Initiated Electron Exchange Luminescence mechanism between the ester of oxalic acid and the hydrogen peroxide in the presence of an activator or a fluorophor. In the present research project it is proposed to study the effects of the metallic ions, such as aluminum (III), lead (II), copper (II), iron (II) (III), manganese (II) and nickel (II), on this reaction. Several parameters will be evaluated by analysis of the intensity maximum as function of the time for different peroxyoxalates and fluorophores, acid medium, buffer solutions and the nature of the opposite ions. Since the reaction medium is partially aqueous (water/acetonitrile) it will be interesting to investigate the effects of concentration of some surfactants (cationic, anionic or amphoteric) which modify the solubility of the reagents and the acidity of the medium, while producing a micro environment which may, or may not, favor the reaction. After the development of the analytical procedures, the results will be compared with the atomic absorption spectrometry. The objective of the project is to develop the analytical procedures for determination of ions in the fresh waters and mineral waters samples and in the edible oils, such as maize, soya beans and olive. (AU)