title: Electromembrane extraction-preconcentration followed by microvolume UV-Vis spectrophotometric determination of mercury in water and fish samples.
abstract: Electromembrane extraction technique combined with microvolume UV-Vis spectrophotometric detection was proposed for the preconcentration-determination of mercury in water and fish samples. The optimized conditions for preconcentration step were: the applied potential 70V, bis(2-ethylhexyl) phosphate as the extractant in 1-octanol 2% v/v, extraction time 10min, stirring rate 700rpm, acceptor and donor solutions pH 3 and 7, respectively. The linear range was found to be 2.3-950.0μgL-1and 40-9500μgkg-1in water and fish samples, with corresponding detection limits of 0.7μgL-1and 12μgkg-1, respectively. The method showed satisfactory repeatability and reproducibility (CV<6%). Methodological validation was performed by using cold vapor atomic absorption spectroscopy. The proposed method provided a rapid, sensitive and accurate method which is applicable for routine analysis of total mercury contents in water and fish samples.
authors.affiliation: Phase Equilibria Research Laboratory, Department of Chemistry, Faculty of Science, University of Zanjan, Postal Code 45371-38791, Zanjan, Iran.
authors.forename: Armin
authors.initials: A
authors.lastname: Fashi
authors.affiliation: Phase Equilibria Research Laboratory, Department of Chemistry, Faculty of Science, University of Zanjan, Postal Code 45371-38791, Zanjan, Iran. Electronic address: yaftian@znu.ac.ir.
authors.forename: Mohammad Reza
authors.initials: MR
authors.lastname: Yaftian
authors.affiliation: Environmental Science Research Laboratory, Department of Environmental Science, Faculty of Science, University of Zanjan, Postal Code 45371-38791, Zanjan, Iran.
authors.forename: Abbasali
authors.initials: A
authors.lastname: Zamani
mesh_terms: D000818:Animals; D005399:Fishes; D008628:Mercury / Q000737:chemistry*; D013053:Spectrophotometry / Q000379:methods*; D014867:Water / Q000737:chemistry*
chemical_list: D014867:Water; D008628:Mercury
keywords: Electromembrane extraction; Fish samples; Mercury; Preconcentration-determination; Water samples