Researchers at the Savannah River Site (SRS) have studied adsorption of uranium, plutonium, and neptunium onto monosodium titanate (MST) at conditions relevant to operation of the Actinide Removal Process (ARP) facility. This study measured actinide loadings at a large phase ratio of simulated wastes solution to mass of MST. The large phase ratio was designed to mimic the maximum phase ratio that would occur during a single process cycle of the ARP facility. Uranium and plutonium loadings measured in this study proved much higher than previous measurements at lower phase ratios.