Abstract

Kamelia Karimnezhad¹  and Ali Moghimi^2*

DOI : http://dx.doi.org/10.13005/ojc/300112

A novel and selective method for the fast determination of trace amounts of Zn(II) ions in water samples has been developed. The procedure is based on the selective formation of Zn(II) ions using magnetic chitosan nanoparticles grafted with β-cyclodextrin at different pH followed by elution with organic eluents and determination by atomic absorption spectrometry The preconcentration factor was 100 (1 ml elution volume) for a 100 ml sample volume. The limit of detection of the proposed method is 1.0 ng ml⁻¹. The maximum sorption capacity of sorbent under optimum conditions has been found to be 5mg of Zn per gram of sorbent. The relative standard deviation under optimum conditions was 3.0% (n = 10). Accuracy and application of the method was estimated by using test samples of natural and synthetic water spiked with different amounts of Zn(II) ion.

Preconcentration; Zn (II); magnetic chitosan nanoparticles grafted with β-cyclodextrin; Solid phase extraction; Flame Atomic Absorption Spectrometry (FAAS)

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