“Determination of Major Cation and Anion Content in Coconut Fiber Ash Potentially Renewable Catalyst: Penentuan Kandungan Kation dan Anion Mayor dalam Abu Serabut Kelapa Berpotensi Katalis Renewable”, JISTECH, vol. 6, no. 2, Jan. 2023, Accessed: Jul. 03, 2026. [Online]. Available: https://www.jistechunipa.com/index.php/istech/article/view/141