Alifah Hernanda, R. .; Fakhri Izzul Haq, M. .; Suprapto, S.; Lailun Ni’mah, Y. . Optimization of Fe Leaching Method for Indonesia Laterite Rocks Using Experiment Design Central Composite Design (CCD)-Response Surface Methodology (RSM). Ind. J. Chem. Anal 2025, 8, 50-61.