Talitha, Anandieka Maya, Zainab El-Dahshan, and Abd-El Aal. “Optimization of Solid Phase Extraction Using Chelating Disk for Cr(III) and Fe(III) Concentration in Water Samples by ICP-AES Analysis”. Journal of Chemical Learning Innovation 3, no. 1 (May 24, 2026): 123–133. Accessed May 25, 2026. https://cahaya-ic.com/index.php/JoCLI/article/view/3243.