DETERMINATION OF POTASSIUM AND SILICON FROM LEFT-OVER OF GOLD ORE USING PROTON INDUCED X-RAY EMISSION. FJS [Internet]. 2023 Mar. 31 [cited 2025 Sep. 8];3(1):273-9. Available from: https://fjs.fudutsinma.edu.ng/index.php/fjs/article/view/1453