title: Development of a new enrichment method for simultaneous determination of copper and zinc in water samples.
abstract: In the present study, an enrichment and separation method for the simultaneous determination of trace amounts of Cu and Zn in water samples was developed. Copper and Zn ions found in water matrix in trace amounts were preconcentrated on Duolite XAD 761 resin without using any chelating agent and determined by flame atomic absorption spectrometer (FAAS). Experimental parameters such as pH, concentration of metal ions, amount of resin, and sample volume for quantitative determination of Cu and Zn ions were optimized. The elution process was performed by using 5 ml of 2 mol/L HCl solution. The preconcentration factors for Cu and Zn were found to be 160 and 200, respectively. Under optimized conditions, limit of detection for Cu and Zn were 2.46 and 3.54 µg/L, respectively. The Langmuir adsorption model was applied to describe the equilibrium isotherm. The Langmuir monolayer adsorption capacity of resin was estimated as 31.2 and 17.7 mg/g for Cu and Zn, respectively. The proposed method was successfully applied to determine the Cu and Zn content of various water samples.
authors.affiliation: Department of Chemistry, Ahi Evran University, Kýrsehir, Turkey. harunciftci@yahoo.com
authors.forename: Harun
authors.initials: H
authors.lastname: Ciftci
authors.forename: Turgay
authors.initials: T
authors.lastname: Tunc
authors.forename: Ibrahim Hudai
authors.initials: IH
authors.lastname: Tasdemir
authors.forename: Esen
authors.initials: E
authors.lastname: Ciftci
mesh_terms: D003300:Copper / Q000032:analysis* / Q000737:chemistry; D004784:Environmental Monitoring / Q000379:methods*; D006863:Hydrogen-Ion Concentration; D007475:Ion Exchange Resins / Q000737:chemistry; D052616:Solid Phase Extraction; D013054:Spectrophotometry, Atomic / Q000295:instrumentation; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry; D015032:Zinc / Q000032:analysis* / Q000737:chemistry
chemical_list: D007475:Ion Exchange Resins; D014874:Water Pollutants, Chemical; D003300:Copper; D015032:Zinc