Determination of Total Phenolic Content and Antioxidant Activity of Ethanol Extract of Green Tea Leaves (Camellia sinensis L.) Based on IC₅₀ Values Using the DPPH Method. JFM [Internet]. 2026 Oct. 30 [cited 2026 Nov. 1];9(1):706-15. Available from: https://ejournal.medistra.ac.id/index.php/JFM/article/view/4060