Furqan, A. F. and 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), pp. 79–84. doi: 10.22373/juritika.v1i2.9324.