DETERMINATION OF POTASSIUM AND SILICON FROM LEFT-OVER OF GOLD ORE USING PROTON INDUCED X-RAY EMISSION. FUDMA JOURNAL OF SCIENCES, [S. l.], v. 3, n. 1, p. 273–279, 2023. Disponível em: http://162.254.38.185/index.php/fjs/article/view/1453. Acesso em: 17 sep. 2025.