Detailed studies have been made on the ion exchange and sorptive properties of aqueous dispersions of single crystals of beta-iron oxide hydroxide and monoclinic zirconia. These microcrystals were prepared in the laboratory and characterised by transmission electron micrographs and electron diffraction patterns. The crystals are typically 1000-2000A in size and have amphoteric ion exchange properties. In this work, a multiion selective electrode titration system working with a highly developed computational and graphic system was developed to determine the ion exchange and sorption properties of these crystals. Ion sieving characteristics of betaFeOOH have been proven and extended to include a separation of chloride from solutions containin...