Abstract
Blood cockles one of shellfish which can potentially be developed as a source of protein and minerals. The shell provides a source of calcium, as the structure is similar to that of bone. This research aims to characterize nano calcium powder from blood cockle (Anadara sp.) shell produced by using different hydrochloric acid (HCl) concentrations. Four concentrations vis. 0.5 N, 1.0 N, 1.5 N and 2.0 N were designed by using a completely randomized design. This research revealed that different the concentration affected the particle size and mineral content of the nano calcium powder, where concentration of 1 N was the most appropriate concentration used. The yield generated was 0.82% with the calcium content of 62.89%, the particle size of 454.4nm and high uniformity.
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