KARIM, N. H.; AI- NUAIMI, S.A.; NASSORY, N. S. Potentiometric Analysis of Samarium Ion in Aqueous Solution Employing Selective Electrode Based on Crown Ethers - Samarium Picrate Complexes in a PVC Membrane. Ibn AL-Haitham Journal For Pure and Applied Sciences, Baghdad, Iraq., v. 19, n. 3, p. 117–133A, 2017. Disponível em: https://jih.uobaghdad.edu.iq/index.php/j/article/view/1653. Acesso em: 3 apr. 2025.