title: Synthesis and application of ion-imprinted polymer nanoparticles for the extraction and preconcentration of mercury in water and food samples employing cold vapor atomic absorption spectrometry.
abstract: We describe a nanosized Hg(II)-imprinted polymer that was prepared from methacrylic acid as functional monomer, ethyleneglycol dimethacrylate as cross-linker, 2,2'-azobisisobutyronitrile (AIBN) as radical initiator, 2, 2'-di pyrydyl amine as a specific ligand, and Hg (II) as the template ions by precipitation polymerization method in methanol as the progeny solvent. Batch adsorption experiments were carried out as a function of pH, Hg (II) imprinted polymer amount, adsorption and desorption time, volume, and concentration of eluent. The synthesized polymer particles were characterized physically and morphologically by using infrared spectroscopy, thermogravimetric analysis, X-ray diffraction, and scanning electron microscopic techniques. The maximum adsorption capacity of the ion-imprinted and non-imprinted sorbent was 27.96 and 7.89 mg g(-1), respectively. Under optimal conditions, the detection limit for mercury was 0.01 μg L(-1) and the relative standard deviation was 3.2 % (n = 6) at the 1.00 μg L(-1). The procedure was applied to determination of mercury in fish and water samples with satisfactory results.
authors: Department of Chemistry, Ilam University, Ilam, Iran, mahmoudroushani@yahoo.com.
authors: Mahmoud
authors: M
authors: Roushani
authors: Shahryar
authors: S
authors: Abbasi
authors: Hossein
authors: H
authors: Khani
mesh_terms: D000327:Adsorption; D000818:Animals; D005399:Fishes / Q000378:metabolism*; D005504:Food Analysis / Q000379:methods*; D057230:Limit of Detection; D008628:Mercury / Q000032:analysis / Q000302:isolation & purification*; D008689:Methacrylates / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D054802:Molecular Imprinting; D053758:Nanoparticles / Q000737:chemistry*; D009570:Nitriles / Q000737:chemistry; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry*; D013054:Spectrophotometry, Atomic / Q000379:methods*; D013055:Spectrophotometry, Infrared; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000302:isolation & purification*; D014961:X-Ray Diffraction
chemical_list: D008689:Methacrylates; D009570:Nitriles; D011108:Polymers; D014874:Water Pollutants, Chemical; C008384:methacrylic acid; C004919:ethylene dimethacrylate; D008628:Mercury; C004526:azobis(isobutyronitrile)