Abstract
AS(III) and As(V) in simulated zinc processing solutions have been determined simultaneously by ion chromatography with triple-step pulsed-potential electrochemical and conductivity detectors, respectively. The ion chromatograms obtained using single-potential and triple-step pulsed potential are compared for arsenite solutions containing various concentrations of sulfuric acid. As(III) and As(V) in commercial copper processing solutions have been determined simultaneously by ion chromatography with ultraviolet detection. Molar absorptivities at 200 nm are determined, and the effects of acid, chloride, and sulfate on the absorbance are discussed. For both analytical procedures, cations must be preseparated with H +-form ion-exchange resin to avoid partial precipitation of arsenic during dilution.
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