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Arsenic(III) in drinking water by anodic stripping voltammetry at the scTRACE Gold using the 946 Portable VA Analyzer Arsenic is ubiquitous in the earth’s crust in low concentrations. Elevated levels can be found in mineral deposits and ores. Arsenic from such deposits leaches into the groundwater in the form of arsenite (AsO33–) and arsenate (AsO43–), causing its contamination. As(III) is more toxic than As(V) and shows higher mobility in the environment. The selective determination of this species is possible using the method described in this document. Results As(III) in drinking water 1.4

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Sample • Bottled mineral water Sulfamic acid Sulfamic acid, NH2SO3H, > VA Application Note V-211 Version 1, published in July 2017 Solutions Electrolyte c(sulfamic acid) = 1 mol/L c(citric acid) = 0.5 mol/L c(KCl) = 0.45 mol/L

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