Comparative Study of Macrocylic Membrane Sensors for Bi and Trivalent Metal Ions: Ion-selective Electrode Design and Application

Authors: Vinay Kumar

Country: India

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Abstract: This research paper presents a comparative study of macrocyclic membrane sensors for the detection of bivalent and trivalent metal ions, focusing on the design and application of ion-selective electrodes (ISEs). The primary objective was to elucidate the differences in sensor performance between these two classes of metal ions, thereby addressing a notable gap in the literature. Utilizing Electrochemical Impedance Spectroscopy (EIS) as the core analytical tool, the study systematically analyzed the interaction of macrocyclic membrane sensors with synthetic aqueous solutions containing known concentrations of Mg²⁺, Ca²⁺ (bivalent) and Al³⁺, Fe³⁺ (trivalent) metal ions. The methodology involved detailed EIS measurements to assess charge transfer resistance (Rct) and double-layer capacitance (Cdl) as indicators of sensor sensitivity and selectivity.
Key findings revealed distinct interaction patterns between the sensors and metal ions based on their valency. Bivalent ions demonstrated a consistent decrease in Rct with increasing concentrations, coupled with a notable rise in Cdl, indicative of effective surface interactions. Conversely, trivalent ions exhibited higher initial Rct values and a more subdued increase in Cdl, suggesting a different, possibly more complex, interaction mechanism. These differential response patterns highlight the potential of macrocyclic membrane sensors to selectively detect and differentiate between bivalent and trivalent ions in mixed-ion environments.

The implications of this research are significant for environmental monitoring, medical diagnostics, and industrial processes, where accurate and selective metal ion detection is crucial. The study not only contributes to the fundamental understanding of ion-sensor interactions but also paves the way for the development of more tailored and efficient ion-selective sensing technologies.

Keywords: Macrocylic Membrane Sensors, Ion-Selective Electrodes, Bivalent Metal Ions, Trivalent Metal Ions, Electrochemical Impedance Spectroscopy, Metal Ion Detection

Paper Id: 230556

Published On: 2024-04-10

Published In: Volume 12, Issue 2, March-April 2024

Cite This: Comparative Study of Macrocylic Membrane Sensors for Bi and Trivalent Metal Ions: Ion-selective Electrode Design and Application - Vinay Kumar - IJIRMPS Volume 12, Issue 2, March-April 2024.

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