Applying the Voltammetry of Microparticles to Assess the Metal Ion Excess Following a Precipitation Reaction: The Determination of Arsenic

Here we demonstrate that the metal ion excess after precipitating a sparingly soluble metal salt can be conveniently determined by a secondary precipitation of a metal salt on an electrode surface, followed by measuring the solid-state electrochemical response of that salt. As an example, the analysis of the arsenic content of solutions is presented. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.