Application of Precipitation-based and Nanoparticle-based Techniques for Fabrication of Potentiometric Sensors for Nano Molar Determination of Chitosan and Polyvinyl Pyrrolidone in Pharmaceutical Formulations and Biological Fluids

Yossra A. Trabik; Nourhan KH. Al-Afify; Amira M. El-Kosasy; Magdy Hanna Nassif, Nancy;