Sutomo, A. , Ridwan, M. , Suswidiantoro, V., Pisacha, I.M. , Daskar, A. and Rosanti, A.S. 2024. The Caffeine Analysis in Tea Bag and Robusta Coffee Using UHPLC Methods. International Journal of Contemporary Sciences (IJCS). 1, 12 (Oct. 2024), 916–931. DOI:https://doi.org/10.55927/ijcs.v1i12.12040.