Furqan, A. F., & Revyyansyah, M. (2025). Principle and Performance of Portable X-Ray Fluorescence (XRF) Analysis for Rock Geochemical Characterization Using Bruker S1 Titan 600. Jurnal Riset Teknik Fisika, 1(2), 79–84. https://doi.org/10.22373/juritika.v1i2.9324