Yasser, Muhammad, and Muhammad Badai. “KAREKTERISASI EKSTRAK ETANOL UBI JALAR UNGU (Ipomea Batatas L) MENGGUNAKAN SPEKTROSKOPI INFRARED”. Cokroaminoto Journal of Chemical Science 1, no. 1 (August 28, 2019): 4–6. Accessed January 29, 2026. https://science.e-journal.my.id/cjcs/article/view/11.