Abstract: Zinc(II) imprinted amino-functionalized silica gel sorbent was synthesized applying surface-imprinting technique in order to pre.concentrate and separate Zn2+ prior to its determination by inductively coupled plasma optical emission spectrometry (ICP-OES). Compared to traditional solid sorbents and non-imprinted sorbent, zinc(II)-imprinted sorbent has higher selectivity and adsorption capacity towards Zn2+. Maximum static adsorption capacities of ion-imprinted and non-imprinted sorbent towards Zn were 12.98 mg g(-1) and 4.36 mg g(-1), respectively. The largest separation factor for zinc(II) imprinted sorbent towards Zn2+ in the presence of Hg2+ was higher than 188. Relative selectivity coefficient ((x,) values for Zn2+/Hg2+ pair were 15.5 and 13.8 - both greater than 1. Distribution coefficient (D) values of zinc(11) imprinted polymers towards Zn2+ were greatly larger than those for Hg2+. Detection limit (3σ) of the method was 0.29 μg L-1 and relative standard deviation equalled 2.6% for eight replicate determination of 10 μg of Zn2+ in 200 mL-in-volume water sample. The proposed method was applied to the determination of trace zinc in biological and water samples with satisfactory results
Template and target information: zinc ion, Zn(II)
Author keywords: zinc(II)-imprinted amino-functionalized silica gel sorbent, Surface imprinting technique, preconcentration and separation, ICP-OES

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