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Application of syringe to syringe dispersive micro solid phase extraction using magnetic layered double hydroxide for determination of cadmium(II) and lead(II) ions in food and water samples

Abstract

In this research work, for the first time, a new mode of dispersive solid-phase extraction named syringe to syringe magnetic dispersive micro solid phase extraction is introduced as an efficient, simple, rapid, and eco-friendly sample extraction method. A nickel–aluminum layered double hydroxide coated on magnetic nanoparticles (Fe3O4@Ni-Al-CO3-LDH), as an efficient nanosorbent, was synthesized and successfully applied for the concurrent extraction of trace amounts of Cd2+ and Pb2+ ions in food and water samples prior to their determination using a microsampling-flame atomic absorption spectrometry technique. After extraction and magnetic separation, the elution step was easily performed through dissolving the magnetic layered double hydroxide (LDH) containing the target analytes in an acidic solution. Also the use of magnetic LDH overcomes the difficulty of phase separation that decreases the extraction time. The optimum conditions efficiently evaluated via the response surface methodology (RSM) consisted of pH 7.0, 13.7 mg of the nanosorbent, 16 extraction cycles, 125 μL of 3.8 mol L-1 of trifluoroacetic acid, and ultrasonic time of 75 s. Under optimal experimental conditions, good linear ranges (0.75-35 ng mL−1 for Cd2+ ion and 4.0-370 ng mL−1 for Pb2+ ion) with the correlation of determinations (R2s) higher than 0.995 were obtainable. The limits of detection were found to be 0.25 and 1.0 ng mL−1 for Cd2+ and Pb2+, respectively. The preconcentration factor for the target analytes was 80 in a 10 mL sample solution. These valuable results indicated the high quality of the developed procedure for the influential quantification of the aforementioned metal ions from food and water samples.

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Supplementary files

Publication details

The article was received on 27 Oct 2017, accepted on 29 Jan 2018 and first published on 29 Jan 2018


Article type: Paper
DOI: 10.1039/C7AY01857F
Citation: Anal. Methods, 2018, Accepted Manuscript
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    Application of syringe to syringe dispersive micro solid phase extraction using magnetic layered double hydroxide for determination of cadmium(II) and lead(II) ions in food and water samples

    S. Arghavani-Beydokhti, M. Rajabi and A. Asghari, Anal. Methods, 2018, Accepted Manuscript , DOI: 10.1039/C7AY01857F

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