“Preparation of a New selective PVC Membrane Electrode for Copper(II) Ion Based on Complex of 1,3-diphenyl-5- (P-nitrophenyl) Formazan as Ionophore with Copper(II)”. (2016) Latakia University Journal -Basic Sciences Series, 37(1). Available at: https://journal.latakia-univ.edu.sy/index.php/bassnc/article/view/1497 (Accessed: 4 November 2026).