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Reference type: Journal
Authors: Ebrahimzadeh H, Moazzen E, Amini MM, Sadeghi O
Article Title: Novel ion-imprinted polymer coated on nanoporous silica as a highly selective sorbent for the extraction of ultratrace quantities of gold ions from mine stone samples.
Publication date: 2013
Journal: Microchimica Acta
Volume: 180
Issue: (5-6)
Page numbers: 445-451.
DOI: 10.1007/s00604-013-0948-0

Abstract: We have developed a gold ion-imprinted polymer (GIP) by incorporating a dipyridyl ligand into an ethylene glycol dimethacrylate matrix which then was coated onto porous silica particles. The material was used for the selective extraction of ultratrace quantities of gold ion from mine stones, this followed by its quantitation by FAAS. The effects of concentration and volume of eluent, pH of the solution, flow rates of sample and eluent, and effect of potentially interfering ions, especially palladium and platinum, was investigated. The limit of detection is <0.2 ng mL-1, the precision (RSD%) is 1.03 %, and recoveries are >99 %. In order to show the high selectivity and efficiency of the new sorbent, the results were compared to those obtained with more simple sorbents possessing the same functional groups. The accuracy of the method was demonstrated by the accurate determination of gold ions in a certified reference material. To the best of our knowledge, there is no report so far on an imprint for gold ions that has such a selectivity over Pd(II) and Pt(II) ions
Template and target information: gold ion
Author keywords: ion imprinted polymer, Nanoporous silica, gold, Mine stone samples

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