MARJONI, Mhd. Riza; TRIJUANDA, Suci Enika; EVANI, Nhila Putri. Analysis of tannin and catechin levels in ethyl acetate extract of gambir twigs (Uncaria gambir Roxb.) using UV-Vis spectrophotometry . Science Midwifery, [S. l.], v. 13, n. 3, p. 735–744, 2025. DOI: 10.35335/midwifery.v13i3.2013. Disponível em: https://midwifery.iocspublisher.org/index.php/midwifery/article/view/2013. Acesso em: 27 apr. 2026.