HAMILTON-AMACHREE, A.; ETASI, N. J. Spectrophotometric Determination of Total Anthocyanin Content (TAC) in Costus afer Flower Extract and its Application as pH Indicator in Acid/Base Titrations. Journal of Chemical Society of Nigeria, [S. l.], v. 44, n. 2, 2019. Disponível em: http://www.journals.chemsociety.org.ng/index.php/jcsn/article/view/286. Acesso em: 29 oct. 2025.