Electrochemical detection of As(III) via iodine electrogenerated at platinum, gold, diamond or carbon-based electrodes

The reaction of iodine, electrogenerated from iodide, is used for the detection of As(III) via electrocatalytic reaction in the diffusion layer of a boron-doped diamond electrode. The merits of this electrode material for this purpose (over platinum, gold or glassy carbon) are demonstrated and the kinetics of the reaction between I-2 and As(III) in acid reported.