Application of Cellulose Modified with p‐Aminobenzoic Groups in Preconcentration System for Determination of Cu, Fe, Ni, and Zn in Fuel Ethanol Samples by Flame Atomic Absorption Spectrometry

Abstract

Cellulose chemically modified with p‐aminobenzoic groups, abbreviated as Cel‐PAB, was used for preconcentration of copper, iron, nickel, and zinc from ethanol fuel, normally used in Brazil as engine fuel. The surface characteristics and the surface area of the cellulose were obtained before and after chemical modification using FT‐IR, elemental analysis, and surface area analysis (B.E.T.). The retention and recovery of the analyte elements were studied by applying batch and column techniques.

Keywords:

• Cellulose chemically modified
• p‐aminobenzoic groups
• preconcentration
• adsorption

Acknowledgements

The authors thank the FAPESP (Projects 03/13362‐6), FUNDIBIO for financial support and CAPES for a fellowships to G. R. de Castro.