title: Electromembrane extraction and spectrophotometric determination of As(V) in water samples.
abstract: In this study, for the first time electromembrane extraction (EME) was used as a highly efficient sample pre-treatment method for the UV-VIS spectrophotometric determination of As(V) in water samples. The influences of experimental parameters during EME were investigated and optimized using one-variable-at-a-time methodology as follows: organic solvent: 1-octanol+2.5% (V/V) di-(2-ethylhexyl) phosphate, applied voltage: 70V, extraction time: 15min, pH of acceptor: 13, stirring rate: 750rpm. The method allowed the determination of As(V) in the range of 5-300ngmL(-1). The relative standard deviation was found to be within the range of 3.4-7.6%. The limit of detection, corresponding to a signal to noise ratio of three, was 1.5ngmL(-1). The proposed method was finally applied to the determination of As(V) in water samples and relative recoveries ranging from 95 to 102% were obtained.
authors.affiliation: Department of Chemistry, Faculty of Science, University of Zanjan, 45371-38791 Zanjan, Iran. Electronic address: makamyabi@gmail.com.
authors.forename: Mohammad Ali
authors.initials: MA
authors.lastname: Kamyabi
authors.affiliation: Department of Chemistry, Faculty of Science, University of Zanjan, 45371-38791 Zanjan, Iran.
authors.forename: Ali
authors.initials: A
authors.lastname: Aghaei
mesh_terms: D020003:1-Octanol; D001151:Arsenic / Q000032:analysis*; D008567:Membranes, Artificial; D009930:Organic Chemicals; D012997:Solvents; D013053:Spectrophotometry / Q000379:methods*
chemical_list: D008567:Membranes, Artificial; D009930:Organic Chemicals; D012997:Solvents; D001151:Arsenic; D020003:1-Octanol
keywords: As(V); Electromembrane extraction; Molybdenum blue complex; Water samples