Process for the electrometric measurement of cyanide ions in solutions containing metal ions

A process for the determination of the cyanide ion content of a solution which comprises cyanide ions, a strong reducing agent, and a silver ion, said method comprising providing in said solution an amount of metal complexer in excess of that required to complex the silver ion;

• providing in contact with said solution a cyanide ion selective electrode that has connected thereto, direct reading potentiometric measurement means and, thereafter, determining from said direct reading potentiometric measurement means the cyanide ion concentration.