title: Preparation of magnetite/poly(styrene-divinylbenzene) nanoparticles for selective enrichment-determination of fenitrothion in environmental and biological samples.
abstract: In the present study, a cross-linked nano-sized spherical magnetic poly(styrene-divinylbenzene) is synthesized and used as an adsorbent for enrichment-determination of fenitrothion. A miniemulsion polymerization procedure was used to prepare the adsorbent. The magnetic adsorbent was characterized by FT-IR, SEM and TEM. The prepared magnetic adsorbent nanoparticles were mixed with magnetite nanoparticles for faster and more efficient magnetic precipitation. The reduced fenitrothion was coupled with 3-methyl-2-benzothiazolinone hydrazone and then the blue colored complex was extracted. The blue derivative of fenitrothion was eluted by a 1 mL aliquot of 1-propanol prior to spectrophotometry at 571 nm. Beer's law was obeyed in the range of 2-230 ng mL(-1) of fenitrothion with relative standard deviation and recovery in the ranges of 0.9-5.1% and 97.2-100.0%, respectively. Selectivity of the method was evaluated, and the method was successfully applied to the determination of fenitrothion in various water, soil, urine and human plasma samples.
authors.affiliation: Department of Chemistry, Faculty of Basic Sciences, University of Mohaghegh Ardabili, Ardabil, Iran. heskandari@uma.ac.ir
authors.forename: Habibollah
authors.initials: H
authors.lastname: Eskandari
authors.forename: Ali
authors.initials: A
authors.lastname: Naderi-Darehshori
mesh_terms: D004784:Environmental Monitoring / Q000379:methods*; D005278:Fenitrothion / Q000032:analysis* / Q000737:chemistry; D052203:Ferrosoferric Oxide / Q000737:chemistry*; D006801:Humans; D007306:Insecticides / Q000032:analysis* / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D015394:Molecular Structure; D053758:Nanoparticles / Q000737:chemistry*; D045483:Rivers / Q000737:chemistry; D012987:Soil / Q000737:chemistry; D020058:Styrene / Q000737:chemistry*; D014753:Vinyl Compounds / Q000737:chemistry*
chemical_list: D007306:Insecticides; D012987:Soil; D014753:Vinyl Compounds; D020058:Styrene; C004985:divinyl benzene; D005278:Fenitrothion; D052203:Ferrosoferric Oxide