title: Inorganic arsenic speciation in natural mineral drinking waters by flow-through anodic stripping chronopotentiometry.
abstract: A simple and inexpensive method for chemical speciation of inorganic As in natural mineral drinking waters by using anodic stripping chronopotentiometry (ASCP) in an electrochemical flow-through cell with an Au wire as the working electrode was described in the present work. The presented method is an attractive alternative to laborious and time-consuming procedures requiring pre-separation of various forms of As before their detection by other flow-through and non flow-through stripping methods. The limits of detection were found to be 0.42 µg L(-1) for As(III) and 0.55 µg L(-1) for As(V), obtained at the deposition potentials of -350 mV and -1600 mV, respectively. The accuracy of the method was assessed by the spiking-and-recovery experiments for particular water samples and the recoveries found, being in range from 99% to 105% for As(III) and from 104% to 106% for As(V), respectively, were quantitative. The proposed method was successfully applied to speciation analysis of inorganic As in water samples with a high content of Cu.
authors.affiliation: Wroclaw University of Technology, Faculty of Chemistry, Department of Analytical Chemistry and Chemical Metallurgy, Wybrzeze Stanislawa Wyspianskiego 27, 50-370 Wroclaw, Poland. Electronic address: dominika.jedryczko@pwr.edu.pl.
authors.forename: Dominika
authors.initials: D
authors.lastname: Jedryczko
authors.affiliation: Wroclaw University of Technology, Faculty of Chemistry, Department of Analytical Chemistry and Chemical Metallurgy, Wybrzeze Stanislawa Wyspianskiego 27, 50-370 Wroclaw, Poland.
authors.forename: Pawel
authors.initials: P
authors.lastname: Pohl
authors.affiliation: Wroclaw University of Technology, Faculty of Chemistry, Department of Analytical Chemistry and Chemical Metallurgy, Wybrzeze Stanislawa Wyspianskiego 27, 50-370 Wroclaw, Poland.
authors.forename: Maja
authors.initials: M
authors.lastname: Welna
mesh_terms: D001151:Arsenic / Q000032:analysis* / Q000737:chemistry*; D060766:Drinking Water / Q000737:chemistry*; D004553:Electric Conductivity; D004563:Electrochemistry / Q000295:instrumentation*; D004566:Electrodes; D057230:Limit of Detection; D008900:Mineral Waters / Q000032:analysis*
chemical_list: D060766:Drinking Water; D008900:Mineral Waters; D001151:Arsenic
keywords: Anodic stripping chronopotentiometry; Direct analysis; Inorganic arsenic species; Natural water; Speciation analysis; Total arsenic