Preconcentration, determination and speciation of iron by solid-phase extraction using dimethyl (E)-2-[(Z)-1-acetyl)-2-hydroxy-1-propenyl]-2- butenedioate

Abstract

A new sensitive and selective procedure for speciation of trace dissolved Fe(III) and Fe(II), using modifed octadecyl silica membrane disks and determination by fame atomic absorption spectrometry was developed. A ML 3 complex is formed between the ligand and Fe(III) responsible for extraction of metal ion on the disk. Various factors infuencing the separation of iron were investigated and the optimized operation conditions were established. Under optimum conditions, an enrichment factor of 166 was obtained for Fe 3+ ions. The calibration graph using the preconcentration system for Fe 3+ was linear between 40.0 and 1000.0 μg L -1.