Determination of Arsenic (III, V, Total) in Polluted Waters by Graphite Furnace Atomic Absorption Spectrometry and Anodic Stripping Voltammetry

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Abstract
An ammonium pyrrolidinedithiocarbamate-methyl isobutyl ketone-electrothermal atomic absorption spectrophotometric (APDC-MIBK-ETA) procedure and a toluene extraction-anodic stripping voltammetric (ASV) procedure were applied for the determination of As (III, V, Total) in some polluted waters. The total arsenic content of these water samples was also determined using the direct ETA and the nickel-matrix modification-ETA methods. There was good agreement among the various methods on the total arsenic content of the water samples. Neither the container material (Pyrex glass or linear polyethylene), nor filtration, nor preservation with 1% HC1 had any significant effect on the total arsenic concentration of the polluted river water and mine leachate samples studied. Also, no As(III) could be detected in the samples.