Jasmin, F., Handayani, A. I. J., & Akmal, T. (2025). Optimization of Extraction Parameters for Phenolics and Flavonoids from Peony (Paeonia lactiflora) Flowers Using Ultrasound-Assisted Extraction. Hydrogen: Jurnal Kependidikan Kimia, 13(1), 1–11. https://doi.org/10.33394/hjkk.v13i1.14346