title: SPE coupled to AAS trace determination of Cd(II) and Zn(II) in food samples using amine functionalized GMA-MMA-EGDMA terpolymer: Isotherm and kinetic studies.
abstract: An ethylenediamine functionalized glycidyl methacrylate (GMA) based terpolymeric chelating resin was synthesized for the separation and preconcentration of Cd(II) and Zn(II) by SPE from bread, rice and fruit juice prior to FAAS determination. The resin was characterized by FT-IR, TGA/DTA, SEM, BET analysis and EDS. Synthesized resin shows a good capacity of 53.96mgg(-1) for Cd(II) and 24.19mgg(-1) for Zn(II) at pH 8.0. Five isotherm equilibrium models were studied to explain the sorption phenomenon out of which Langmuir, Dubinin-Radushkevich, Scatchard and Temkin models were found to be the best fitted. The limit of detection (LOD) and limit of quantification (LOQ) were observed to be 1.5 and 5.1μgL(-1) for Cd and 1.2 and 4.1μgL(-1) for Zn. The reliability of the method was investigated by the analysis of SRM and the recovery of analytes from various spiked food samples.
authors.affiliation: Analytical Research Laboratory, Department of Chemistry, Aligarh Muslim University, Aligarh 202002, India. Electronic address: aminulislam.ch@amu.ac.in.
authors.forename: Aminul
authors.initials: A
authors.lastname: Islam
authors.affiliation: Analytical Research Laboratory, Department of Chemistry, Aligarh Muslim University, Aligarh 202002, India.
authors.forename: Suneel
authors.initials: S
authors.lastname: Kumar
authors.affiliation: Analytical Research Laboratory, Department of Chemistry, Aligarh Muslim University, Aligarh 202002, India.
authors.forename: Noushi
authors.initials: N
authors.lastname: Zaidi
authors.affiliation: Analytical Research Laboratory, Department of Chemistry, Aligarh Muslim University, Aligarh 202002, India.
authors.forename: Hilal
authors.initials: H
authors.lastname: Ahmad
mesh_terms: D002104:Cadmium / Q000032:analysis*; D002614:Chelating Agents / Q000737:chemistry; D004852:Epoxy Compounds / Q000737:chemistry; D005504:Food Analysis; D008689:Methacrylates / Q000737:chemistry; D015203:Reproducibility of Results; D012117:Resins, Synthetic / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D015032:Zinc / Q000032:analysis*
chemical_list: D002614:Chelating Agents; D004852:Epoxy Compounds; D008689:Methacrylates; D012117:Resins, Synthetic; D002104:Cadmium; D015032:Zinc; C007870:glycidyl methacrylate
keywords: FAAS; Terpolymer; food analysis; solid phase extraction