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Reference type: Journal
Authors: Chang XJ, Jiang N, Zheng H, He Q, Hu Z, Zhai YH, Cui YM
Article Title: Solid-phase extraction of iron(III) with an ion-imprinted functionalized silica gel sorbent prepared by a surface imprinting technique.
Publication date: 2007
Journal: Talanta
Volume: 71
Issue: (1)
Page numbers: 38-43.
DOI: 10.1016/j.talanta.2006.03.012
Alternative URL: http://www.sciencedirect.com/science/article/B6THP-4JRVFRC-9/2/0d5a2e276be4fca0cb1d94dc63809239

Abstract: A new Fe(III)-imprinted amino-functionalized silica gel sorbent was prepared by a surface imprinting technique for selective solid-phase extraction (SPE) of Fe(III) prior to its determination by inductively coupled plasma atomic emission spectrometry (ICP-AES). Compared with non-imprinted polymer particles, the ion-imprinted polymers (IIPs) had higher selectivity and adsorption capacity for Fe(III). The maximum static adsorption capacity of the ion-imprinted and non-imprinted sorbent for Fe(III) was 25.21 and 5.10 mg g-1, respectively. The largest selectivity coefficient of the Fe(III)-imprinted sorbent for Fe(III) in the presence of Cr(III) was over 450. The relatively selective factor (αr) values of Fe(III)/Cr(III) were 49.9 and 42.4, which were greater than 1. The distribution ratio (D) values of Fe(III)-imprinted polymers for Fe(III) were greatly larger than that for Cr(III). The detection limit (3σ) was 0.34 μg L-1. The relative standard deviation of the method was 1.50% for eight replicate determinations. The method was validated by analyzing two certified reference materials (GBW 08301 and GBW 08303), the results obtained is in good agreement with standard values. The developed method was also successfully applied to the determination of trace iron in plants and water samples with satisfactory results
Template and target information: iron ion, ferric ion, Fe(III)
Author keywords: Fe(III)-imprinted amino-functionalized silica gel sorbent, Preparation, Surface imprinting technique, Solid-Phase Extraction (SPE), ICP-AES

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