Preconcentration of Ion Ni(II) using Ca-Alginate Modified Resin with Dimethylglyoxime as a Filler Material of Column. Valensi [Internet]. 2020 May 29 [cited 2025 Dec. 3];6(1):40-6. Available from: https://journal.uinjkt.ac.id/valensi/article/view/7700