PVC-Based Cerium Phosphate Membrane Exhibiting Selectivity for Molybdate Anions

Document Type : Research Note


1 Department of Chemistry, Faculty of Science, Shahid Beheshti University, P.O. Box 19395-4716, Tehran, I.R. IRAN

2 Laboratory of Microanalysis, Institute of Biochemistry & Biophysics, University of Tehran, P.O. Box 13145-1384, Tehran, I.R. IRAN



A PVC-based membrane containing cerium phosphate was developed. Unlike the cerium phosphate itself that acts as a cation exchanger, the membrane exhibited anion-exchange properties. Therefore, the utility of this compound as a sensory element for detection of molybdate ions was pursued. The response of molybdate selective electrode based on this membrane was perfectly linear in the concentration range 1.98´10-5 to 10-1 M. Characteristics of this electrode such as electric resistance, stability and membrane preconditioning process, and regeneration of its sensitivity are reported.


Main Subjects