Suprapto, Suprapto -, Yatim Lailun Ni’mah, and Feraldy A. Putrama. “Direct Cu, Fe, and Ni Ions Multicomponent Analysis Using UV-Vis Spectrophotometric Method”. Indonesian Journal of Chemical Analysis (IJCA) 6, no. 2 (September 1, 2023): 106–115. Accessed May 18, 2024. https://jurnal.uii.ac.id/IJCA/article/view/28000.