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Ion-selective electrode for the determination of prenalterol
1Department of Chemistry, Faculty of Science, Fayoum, Cairo University, Fayoum Branch, Fayoum, Egypt.
Talanta
|October 31, 2008
Summary
A novel prenalterol ion-selective electrode was developed using a PVC membrane, offering a reliable method for drug analysis. This electrode demonstrates excellent sensitivity and selectivity for prenalterol detection in pharmaceutical formulations.
Area of Science:
- Electroanalytical Chemistry
- Chemical Sensors
- Materials Science
Background:
- Prenalterol (Pr) is a pharmaceutical compound requiring accurate quantification.
- Ion-selective electrodes (ISEs) offer a sensitive and selective method for ion determination.
- PVC membrane electrodes are widely used due to their stability and ease of fabrication.
Purpose of the Study:
- To develop and characterize a new prenalterol ion-selective electrode.
- To evaluate the electrode's performance in terms of sensitivity, selectivity, and stability.
- To assess the electrode's applicability for determining prenalterol in pharmaceutical formulations.
Main Methods:
- Fabrication of a PVC membrane electrode using a prenalterol-tetraphenylborate ion-pair complex.
- Electrochemical characterization including Nernstian response, usable concentration range, and response time.
- Evaluation of electrode stability, pH influence, and selectivity against interfering ions.
- Application of the electrode for prenalterol determination in pure solutions and pharmaceutical samples using standard addition and potentiometric titration.
Main Results:
- The developed electrode exhibited a linear Nernstian response (56.3 mV/decade) over a wide concentration range (1.2x10^-5 - 3.2x10^-2 M).
- The electrode demonstrated a fast response time (<=20 s) and good operational stability for up to 24 hours.
- Performance was unaffected by pH variations between 2.2-7.5, and high selectivity for prenalterol was observed.
- Accurate determination of prenalterol in pharmaceutical formulations was achieved with low relative standard deviations (0.8-2.1%).
Conclusions:
- A robust and selective prenalterol ion-selective electrode based on a PVC membrane has been successfully developed.
- The electrode offers a reliable and sensitive analytical tool for prenalterol quantification in various matrices.
- This method provides a valuable alternative for quality control of prenalterol in pharmaceutical products.
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