Journal
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A
Volume 88, Issue 12, Pages 2157-2164Publisher
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S0036024414120024
Keywords
preconcentration; Co(II); magnetic chitosan nanoparticles grafted with beta-cyclodextrin; solid phase extraction; flame atomic absorption spectrometry (FAAS)
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Funding
- Chemistry Department of Varamin-Pishva branch Islamic Azad University
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A novel and selective method for the fast determination of trace amounts of Co(II) ions in water samples has been developed. The procedure is based on the selective sorption of Co(II) ions using magnetic chitosan nanoparticles grafted with beta-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 5 mg of Co per gram of sorbent. The relative standard deviation under optimum conditions was 3.0% (n = 10). Accuracy and applicability of the method was estimated using test samples of natural and model water with different amounts of Co(II).
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