PROCESS FOR DETERMINING THE EQUILIBRIUM CONCENTRATIONS OF HALOGEN, HALOGENIDE, TRIHALOGENIDE, HYPOHALOGENITE AND HYPOHALOGENIC ACID COMPONENTS IN AQUEOUS SOLUTIONS

摘要

A process is disclosed for determining the equilibrium concentrations of halogen, halogenide, trihalogenide, hypohalogenite and/or hypohalogenic acid components of an aqueous solution obtained by oxidising a predetermined amount of halogenide or by dilution with halogenide. The process is characterised in that the redox potential of the oxidised or diluted solution is measured before and after diluting it. The analysis values to be determined are calculated from the following equations: (a) the halogenide weight assessment; (b) the Nernst equation; and (c) the terms of the mass action of the chemical equations for hydrolysis, dissociation and trihalogenide formation. The process is particularly suitable for determining the equilibrium concentrations in aqueous iodine solutions. A simplified weight assessment equation is disclosed that dispenses with pH-value measurements.