title: Use of nanoporous Cu(II) ion imprinted polymer as a new sorbent for preconcentration of Cu(II) in water, biological, and agricultural samples and its determination by electrothermal atomic absorption spectrometry.
abstract: A new and selective Cu(ll) ion imprinted polymer was prepared by formation of 1-(2-pyridylazo)-2-naphthol complex for selective extraction and preconcentration of Cu ions. Polymerization was performed with ethylene glycol dimethacrylate as a crosslinking monomer and methacrylic acid as a functional monomer in the presence of 2,2'-azobis(isobutyronitrile) as an initiator via a bulk polymerization method. The Cu(ll) imprinted polymeric particles were characterized by scanning electron microscopy and IR spectrometry. The imprint Cu ion was removed from the polymeric matrix using 2 M HNO3. Optimum pH for maximum sorption was 5-8. Maximum sorbent capacity and the enrichment factor for Cu(ll) were 11.3 mg/g and 100, respectively. The RSD and LOD of the method were evaluated as +/-4.3% and 8.7 ng/L, respectively. The proposed method is simple, highly selective, and sensitive and can be applied to the determination of ultratrace amounts of Cu in water, biological, and agricultural samples.
authors.forename: Hamid
authors.initials: H
authors.lastname: Fazelirad
authors.forename: Mohammad
authors.initials: M
authors.lastname: Ali Taher
authors.forename: Hamid
authors.initials: H
authors.lastname: Ashkenani
mesh_terms: D000327:Adsorption; D000383:Agriculture; D003300:Copper / Q000032:analysis*; D002523:Edible Grain / Q000737:chemistry; D055664:Electrochemical Techniques; D007477:Ions / Q000737:chemistry; D053768:Metal Nanoparticles / Q000737:chemistry*; D054802:Molecular Imprinting; D010316:Particle Size; D018515:Plant Leaves / Q000737:chemistry; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry*; D016062:Porosity; D013054:Spectrophotometry, Atomic; D013499:Surface Properties; D013662:Tea / Q000737:chemistry; D013696:Temperature; D014675:Vegetables / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D007477:Ions; D011108:Polymers; D013662:Tea; D014874:Water Pollutants, Chemical; D003300:Copper