Aqilah Az zahirah, Oktaviana AENA. The Effect of Impurities on Nickel Content In Ore Samples Using Oven and Roasted Preparation Methods. JGCEE [Internet]. 2025 Jun. 30 [cited 2025 Sep. 2];1(2):117-25. Available from: https://ejournal.candela.id/index.php/jgcee/article/view/50