Fitri NC, Pratiwi Y. Analisis Kadar Kafein dalam Sampel Kopi Instan dan Minuman Berenergi Menggunakan High Performance Liquid Chromatography (HPLC). jrskt [Internet]. 2023Dec.25 [cited 2025Apr.21];9(2):73 -80. Available from: http://103.8.12.212:33180/unj/index.php/jrskt/article/view/44525