Surface analysis of new chlorpromazinium plastic membrane electrodes

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New chlorpromazinium (Cp) plastic membrane electrodes of the conventional type were constructed and characterized. They are based on incorporation of Cp-reineckate (CpRn) ion pair, Cp-phosphotungstate (Cp3PT), or Cp-phosphomolybdate (Cp3PM) ion associate into poly(vinyl chloride) membrane. The electrodes exhibited calibration graph slopes of 49.83, 52.87, and 61.30 mV/Cp concentration decade over life spans of 1, 5, and 3 days, respectively. All electrodes proved to be selective for Cp and have been applied to the assay of a pharmaceutical preparation. Energy dispersive spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS), as well as scanning electron microscopy (SEM) showed that the limitation of the lifetime of the electrodes is attributed to leaching of the ion exchanger from the membrane into the test solution in addition to deformation of the surface. © 2007 Elsevier B.V. All rights reserved.




Al-Shatti, L. A., Marafie, H. M., & Shoukry, A. F. (2008). Surface analysis of new chlorpromazinium plastic membrane electrodes. Journal of Pharmaceutical and Biomedical Analysis, 46(2), 328–334.

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