Abstract
Hydroxy-carbonate apatite (CAp) compositions containing carbonate ions from 0 to 10.9 wt% were synthesized by a wet chemical method. Infrared analysis revealed that carbonate ions were substituted both PO 4 3 - and OH - sites. The introduction of CO 3 2 - ion into the hydroxyapatite lattice led to an increase in specific surface area and surface charge density. Blood clotting properties were not affected by the contact with CAp samples. The adsorption behavior of proteins was investigated by contacting CAp with model saline containing bovine serum albumin (BSA) and β 2 -microglobulin (β 2 -MG). The selectivity against β 2 -MG increased with increase in the amount of carbonate ions. As surface charge density increased with increase in the amount of carbonate ions, surface charge density played an important role in selective adsorption of β 2 -MG, but not a sole factor.
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