Potentiometric Determination of Mebeverine Hydrochloride Using Imprinted Molecular Polymer in PVC Matrix Membrane


Four molecular imprinted polymer (MIP) membranes for Mebeverine.HCl (MBV.HCl) were prepared based on PVC matrix. The imprinted polymers were prepared by polymerization of 2-acrylamido-2-methyl-1-propane sulphonic acid (AMPS) as monomer, pentaerythritoltriacrylate (PETRA) as a cross linker ,benzoyl peroxide (BPO) as an initiator and mebeverine as a template. Four different types of plasticizers of different viscosities were used and the electrodes were fully characterized in terms of plasticizer type, response time, lifetime, pH and detection limit. The MBV-MIP electrodes exhibited Nernstian response in concentration range from 1.0×10-6 to1.0×10-1 M with slopes of 13.98, 19.60, -20.43 and 19.01 mV/ decade. The detection limit and quantification are found to be 4×10-6, 3× 10-6, 2× 10-5and 1.2× 10-6 M ,respectively. Interference study for inorganic cations and amino acids was also studied. The best electrode based tris (2-ethyl hexyl) phosphate plasticizer was applied successfully for potentiometric determination of mebeverine in commercial tablets. Excellent average recovery obtained by potentiometric methods was about 102.26% which is in good agreements with British Pharmacopoeia.