Abstract
The objective of this study was to determine how protein adsorption is affected by insoluble calcium salts when the salts are dispersed in sodium caseinate solution and its effect on suspension stability. Calcium carbonate (CaCO3), hydroxyapatite (HA) and tricalcium phosphate (TCP) showed different adsorption capacities. The saturation of protein with CaCO3 was the lowest of the three. The adsorption preference of α-casein (α-CN) and β-casein (β-CN) protein fractions was different depending on the calcium salt. For CaCO3, α-CN was preferentially adsorbed over β-CN, while β-CN was preferred for HA and a similar decrease trend of α-CN and β-CN for TCP. The protein affected the stability of the calcium suspension depending on the protein concentration. The critical concentration of protein that needed to stabilize suspension varied among calcium salts.
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