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Preconcentration and ultra-trace determination of hexavalent chromium ions using a new tailor made polymer nanoparticles coupled by graphite furnace atomic absorption spectrometry: ultrasonic assisted-dispersive solid phase extraction

Abstract

In this paper, we describe ultrasonic assisted-dispersive solid phase extraction based on tailor made polymer (UA-DSPE-TMP) nanoparticles for the selective extraction of Cr(VI) ions. Ultrasound is a good and robust method to facilitate the extraction of the target ions in the sorption step and elution of the target ions in the desorption step. The tailor made polymer nanoparticles that used in the UA-DSPE-TMP was prepared by precipitation polymerization technique. The tailor made polymer nanoparticles was synthesized using methacrylic acid as a functional monomer, ethylene glycol dimethacrylate as the cross-linker, 2,2ʹ- azobisisobutyronitrile as the initiator, 1,5-diphenylcarbazide as the ligand, methanol as the solvent, and Cr(VI) as the template ion, through precipitation polymerization technique. The tailor made polymer nanoparticles were characterized by Fourier transformed infra-red spectroscopy (FTIR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), elemental analysis (CHN) and energy-dispersive X-ray spectroscopy (EDX). The effect of influencing parameters on extraction of Cr(VI) by the prepared tailor made polymer nanoparticles was evaluated and optimized. The optimum conditions for the method were: pH of solution: 1.0, sonication time for sorption: 10 min, TMP amount: 10 mg, type and concentration of eluent: NaOH/EDTA 0.5/0.1 mol L-1, volume of eluent: 200 microliter and sonication time for desorption, 2 min. Under the optimized conditions the limit of detection and relative standard deviation for the detection of Cr(VI) by the introduced method was found to be 8.0 ng L−1 and < 7 %, respectively.

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Publication details

The article was received on 05 Apr 2018, accepted on 12 May 2018 and first published on 14 May 2018


Article type: Paper
DOI: 10.1039/C8NJ01608A
Citation: New J. Chem., 2018, Accepted Manuscript
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    Preconcentration and ultra-trace determination of hexavalent chromium ions using a new tailor made polymer nanoparticles coupled by graphite furnace atomic absorption spectrometry: ultrasonic assisted-dispersive solid phase extraction

    S. Parvizi, M. Behbahani, F. Zeraatpisheh and A. Esrafily, New J. Chem., 2018, Accepted Manuscript , DOI: 10.1039/C8NJ01608A

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