Hasnaeni, Selpida Handayani, Fadhillah Resky Utami, and Nini Nirmala Majid. 2025. “Quantification of Flavonoid Compounds in Keji Beling Leaves (Strobilanthes Crispa (L.) Blume) Extracted by Ultrasonic Assisted Extraction (UAE) and Maceration Using TLC Densitometry”. Hydrogen: Jurnal Kependidikan Kimia 13 (5). https://doi.org/10.33394/hjkk.v13i5.17748.