Analysis of Caffeine, Ash, Water and Coffee Extract Levels On Commercial Ground Coffee Samples. ALKIMIA : Jurnal Ilmu Kimia dan Terapan, [S. l.], v. 6, n. 2, p. 276–284, 2023. DOI: 10.19109/alkimia.v6i2.14517. Disponível em: https://jurnal.radenfatah.ac.id/index.php/alkimia/article/view/14517.. Acesso em: 10 sep. 2024.