SEPTI WULANDARI; MAURITZ PANDAPOTAN MARPAUNG. PENATAPAN KADAR ALKALOID INFUSA BIJI KOPI ROBUSTA SANGRAI (Coffea canephora Pierre Ex. A Froehner) DENGAN SPEKTROFOTOMETRI UV-VIS. Jurnal Kesehatan : Jurnal Ilmiah Multi Sciences, v. 12, n. 02, p. 113 - 119, 31 Dec. 2022.