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Title: Determination of As(III) by anodic stripping pulse voltammetry using gold and glassy carbon electrodes
Authors: Ramadan, A A
Mandil, H
Issue Date: Nov-1989
Publisher: NISCAIR-CSIR, India
Abstract: Determination of As(III) by anodic stripping pulse voltammetry (ASPV) in acetonitrile (0.1 M Li ClO4) using gold electrode has been studied. A number of supporting types of pulses have been examined, and the pulses of linearly increasing amplitude found to give the greatest sensitivity. The relative standard deviation is 3.5% at very low concentration of 0.3 ng/L (4 x 10-12 M). The simultaneous discharge-ionization of arsenic with mercury and copper has also been studied by ASPV on a glassy carbon electrode in acetonitrile (0.1 M LiClO4). It is shown that co-deposition leads to the formation of Hg3As2 and Cu3As. As(III) can be determined with increase in sensitivity from 5 x 10-5 M to 5 x 10-8 M and 1 x 10-7 M of As(III) by adding Cu(II) and Hg(II) to the solution, respectively. The relative standard deviation is 2.1% to 7.4%.
Page(s): 984-988
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.28A(11) [November 1989]

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