Analisis Kadar Kafein dalam Green Bean dan Roasted Bean Kopi Robusta (Coffea canephora) Temanggung Menggunakan Spektrofotometer UV: Analysis of Caffeine Levels in Green Bean and Roasted Bean of Robusta Coffee (Coffea canephora) Temanggung Using UV Spectrophotometer. JSK [Internet]. 2024 Nov. 14 [cited 2024 Nov. 15];4(6):577–584. Available from: https://jsk.ff.unmul.ac.id/index.php/JSK/article/view/474