HASIBUAN, P. Y.; DAULAY , A. S.; RIDWANTO, R.; PULUNGAN , A. F. Determination of Tannin Content in Mangkokan Leaves (Polyscias scutellaria (Burm.f.) Fosberg) and Guava Leaves (Psidium guajava L.) Using UV-Vis Spectrophotometry. Journal of Pharmaceutical and Sciences, [S. l.], v. 8, n. 4, p. 3048–3057, 2025. DOI: 10.36490/journal-jps.com.v8i4.972. Disponível em: https://journal-jps.com/new/index.php/jps/article/view/972. Acesso em: 10 apr. 2026.