Rahma U, Zulfajri M, Ismulyati S. Evaluation of anthocyanin extracted from Lempeni (Ardisia Elliptica l.) fruit as a new natural acid-base indicator. IJBCh [Internet]. 2025 Jul. 2 [cited 2025 Jul. 9];18(1). Available from: https://ijbch.kaznu.kz/index.php/kaznu/article/view/942