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Abstract: A new ion-imprinted amino-functionalized silica gel sorbent was synthesized by surface-imprinting technique for preconcentration and separation of Hg(II) prior to its determination by inductively coupled plasma optical emission spectrometry (ICP-OES). Compared to the traditional solid sorbents and non-imprinted polymer particles, the ion-imprinted polymers (IIPs) have higher adsorption capacity and selectivity for Hg(II). The maximum static adsorption capacity of the imprinted and non-imprinted sorbent for Hg(II) was 29.89 mg g(-1) and 11.21 mg g(-1), respectively. The highest selectivity coefficient for Hg(II) in the presence of Zn(II) exceeded 230. The detection limit (3 sigma) of the method was 0.25 mu g L-1. The relative standard deviation of the method was 2.5% for eight replicate determinations of 10 mu g of Hg2+ in 200 mL-in-volume water sample. The procedure was validated by performing the analysis of the certified river sediment sample (GBW 08603, China) using the standard addition method. The developed method was also successfully applied to the determination of trace mercury in Chinese traditional medicine and water samples with satisfactory results
Template and target information: mercury ion, Hg(II)
Author keywords: Ion imprinted polymers (IIPs), Solid-Phase Extraction (SPE), Surface imprinting technique, preconcentration, Hg(II), ICP-OES