Preparation of Calcium Citrate Malate Using Citric Acid and Malic Acid with Calcium Hydroxide Synthesized from Duck Eggshell

Authors: Ronald Allan S. delos Reyes 1,a, Marc Andre D. Mecaydor1,b, Angelu R. Pesito1,c, Mariah Shaira A. Razon1,d

1 Malayan Colleges Laguna, Pulo Diezmo, Cabuyao, Laguna, Philippines

[email protected], [email protected], [email protected], [email protected]

Abstract— This research work presents an optimum setting at which the production of calcium citrate malate would have the highest yield. The factors that were varied are temperature and the concentrations of citric acid and malic acid. Duck eggshells were used as the source of calcium. The temperature settings were at room temperature (25°C) and at 80°C, the concentrations of citric acid at 1.5 M and 1.7 M and that of malic acid at 2.2 M and at 2.5 M. Using 23 factorial design of experiment (8 settings), the main effects and the interaction effects were plotted to derive an empirical model to predict the yield of calcium citrate malate. Furthermore, a comparison of x-ray diffraction graphs was conducted to evaluate the final product.

Keywords— Calcium Citrate Malate, Citric Acid, Eggshell

Citation— Delos-Reyes, R. A. S., Mecaydor, M. A. D., Pesito, A. R., & Razon, M. S. A. (2021). Preparation of Calcium Citrate Malate Using Citric Acid and Malic Acid with Calcium Hydroxide Synthesized from Duck Eggshell. Key Engineering Materials, 897, 117–123. 

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