Please use this identifier to cite or link to this item:
|Title:||Determination of As(III) by anodic stripping pulse voltammetry using gold and glassy carbon electrodes|
|Authors:||Ramadan, A A|
|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%.|
|Appears in Collections:||IJC-A Vol.28A(11) [November 1989]|
Items in NOPR are protected by copyright, with all rights reserved, unless otherwise indicated.