title: Synthesis and application of chloromethylated polystyrene modified with 1-phenyl-1,2-propanedione-2-oxime thiosemicarbazone (PPDOT) as a new sorbent for the on-line preconcentration and determination of copper in water, soil, and food samples by FAAS.
abstract: In this paper, we report a simple and sensitive on-line solid phase extraction system for the preconcentration and determination of Cu(II) by flame atomic absorption spectrometry (FAAS). This method is based upon the on-line retention of copper at pH 5.0 on a minicolumn packed with chloromethylated polystyrene modified by 1-phenyl-1,2-propanedione-2-oxime thiosemicarbazone (PPDOT) as a new solid-phase extraction (SPE) sorbent. The retained Cu(II) ions were eluted with 1.0M HNO(3), and transported directly to FAAS for determination. Several chemical and flow variables were studied and optimized for a quantitative preconcentration and determination of copper(II). At the optimized conditions, for preconcentration of 10.0 mL of a sample solution, a linear calibration graph was obtained over the concentration range of 3.00-120.0 μg L(-1) for Cu(II). The limit of detection (3σ), limit of quantification (10σ), and enrichment factor are 0.56 μg L(-1), 2.0 μg L(-1) and 41, respectively. The relative standard deviation (n = 6) at 20 μg L(-1) of Cu(II) is 2.0%. This method could be applied for determination of trace amounts of Cu(II) in water, soil, and food samples with satisfactory results.
authors.affiliation: College of Chemistry, Shahrood University of Technology, PO Box 36155-316, Shahrood, Iran. marab@shahroodut.ac.ir
authors.forename: Mansour Arab
authors.initials: MA
authors.lastname: Chamjangali
authors.forename: Ghadamali
authors.initials: G
authors.lastname: Bagherian
authors.forename: Ali
authors.initials: A
authors.lastname: Mokhlesian
authors.forename: Bahram
authors.initials: B
authors.lastname: Bahramian
mesh_terms: D000327:Adsorption; D002021:Buffers; D002623:Chemistry Techniques, Analytical / Q000379:methods*; D003300:Copper / Q000032:analysis*; D004305:Dose-Response Relationship, Drug; D004867:Equipment Design; D005504:Food Analysis / Q000379:methods*; D005506:Food Contamination / Q000032:analysis*; D006863:Hydrogen-Ion Concentration; D007477:Ions; D008670:Metals / Q000737:chemistry; D008956:Models, Chemical; D011137:Polystyrenes / Q000737:chemistry*; D012664:Semicarbazones / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis*; D013054:Spectrophotometry, Atomic / Q000379:methods; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: C526768:1-phenyl-1,2-propanedione-2-oximethiosemicarbazone; D002021:Buffers; D007477:Ions; D008670:Metals; D011137:Polystyrenes; D012664:Semicarbazones; D012989:Soil Pollutants; D014874:Water Pollutants, Chemical; D003300:Copper