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Selective solid phase extraction and preconcentration of iron(III) based on silica gel-chemically immobilized purpurogallin by Mohamed E Mahmoud; Mohammed S.M Al Saadi is a Chemistry article available to read on EtoBox.

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The immobilization of purpurogallin on the surface of amino group containing silica gel phase for the formation of a newly synthesized silica gel-bound purpurogallin (SGBP) is described. The surface modification was studied and evaluated by determination of the surface coverage value by both the elemental analysis and metal probe testing method, which was found to be 0.485 and 0.460 mmol g -1 , respectively. The metal sorption properties of SGBP were examined by a series of di-and tri-valent metal ions. The metal capacity values (mmol g -1 ) for this series of metal ions were also determined under different buffer solutions (pH 1.0-6.0) as well as shaking times by the batch equilibrium technique. The results of this study confirmed the strong affinity and selectivity as well as the fast equilibration and interaction processes of SGBP and Fe(III) compared to the other tested metal ions. The reduction-oxidation process of iron(II)/iron(III) by SGBP was also studied and the results indicated only 2.1% reduction of iron(III) into iron(II). The selectivity incorporated into silica gel phase via the immobilization of purpurogallin was intensively studied for a several binary mixtures con

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Author

Mohamed E Mahmoud; Mohammed S.M Al Saadi

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0003-2670)

Published

2001

Language

EN

Field

Chemistry (Physical Sciences)