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Abstract
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A simple co-precipitation method was applied for the preparation of aluminum-doped magnesium ferrite
(AlxMgFe2-xO4) nanoparticles. The prepared AlxMgFe2-xO4 nanoparticles was characterized by scanning electron microscopy, Fourier transform infrared spectroscopy and X-ray diffraction. The synthesized AlxMgFe2-xO4
nanoparticles was applied as an adsorbent for developing a novel magnetic solid-phase extraction method for the
preconcentration of cadmium ion in aqueous samples, following its quantification by flame atomic absorption
spectrometry. Based on the method validation, the method linear dynamic range was 0.2–24.0 ng mL−1 with a
limit of detection of 0.05 ng mL−1. The intra- and inter-day precision of the developed method were evaluated by
conducting five consecutive replicate experiments in one day and five days and the relative standard deviation
percentages were obtained to be 2.6% and 3.5%, respectively. Under optimized conditions, the accuracy of the
presented method was evaluated by the analysis of a certified reference sample. Moreover, the applicability of the
developed method for Cd(II) ion determination was validated by preconcentration and determination of Cd(II)
ion in various natural waters
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