Adsorption of Metanil Yellow Using Flavonoid Extract from Longan Peel (Dimocarpus longan): Optimization of pH and Concentration, Etika, Sri Benti, Kurniawati Desy, Mulia Melindra, Darussalam Rahni, Suryani Okta, Nasra Edi, and frista Nada , Pharmacognosy Journal, December 2024, Volume 16, Issue 6, p.1315-1319, (2024)