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Rahmawati, I., Shabrina, N., Fachri, B., Amini, H., Palupi, B., Rizkiana, M., Nurtsulutsiyah, N., Pradipta, S., Afwal, D. and Reza, M. 2022. Effect of Time Variation on Chlorophyll Concentration in Cocoa Leaf Extraction using the UAE (Ultrasonic Assisted Extraction) Method. Jurnal Kartika Kimia. 5, 1 (May 2022), 58-63. DOI:https://doi.org/10.26874/jkk.v5i1.97.