https://orcid.org/0000-0002-6833-6083
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ABSTRACT
A magnetic solid-phase extraction using magnetite coated with polyaniline-polythiophene copolymer (Fe3O4@coPANI-PTH) was applied for preconcentration of Ni(II) and Cu(II) in some soft drinks and spice samples followed by microsample injection system-flame atomic absorption spectrometry (MIS-FAAS). Preconcentration optimisations including pH, amount of adsorbent, eluent type and volume, sample volume, interfering ion effects were investigated. Relative recoveries of 85.2–96.8% were satisfactorily obtained by extracting both analytes from 50 mL sample solution buffered at pH 10 to 0.5 mL eluent using 100 mg Fe3O4@coPANI-PTH. Good linearity was obtained ranging from 5 to 80 µg L−1 with a regression coefficient of 0.999. Limits of detection for Ni(II) and Cu(II) were 2.8 and 1.2 µg L−1, respectively. The accuracy of the method was confirmed by the analysis of certified reference samples and real samples spiked with the analytes. The relative error and standard deviation of the current method for both analytes were smaller than 6%. The established method was applied to commercially available some local soft drinks and spice samples.
Acknowledgments
The author would like to thank Prof. Dr Latif ELCI for allowing access to use instrumentation available in his research laboratory. The author would like to thank Prof. Dr Mustafa SOYLAK for BET and AFM analysis and their interpretation of the results.
Disclosure statement
No potential conflict of interest was reported by the author.
Supplementary material
Supplemental data for this article can be accessed here.