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Related Concept Videos

Potentiometry: Membrane Electrodes01:15

Potentiometry: Membrane Electrodes

Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at the...

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Multi-analyte Biochip (MAB) Based on All-solid-state Ion-selective Electrodes (ASSISE) for Physiological Research
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Development of a multiple-bile-ion-sensing membrane electrode.

Sudeshna M Chatterjea1, Koustubh Panda

  • 1Department of Biotechnology and Dr. B.C. Guha Centre for Genetic Engineering and Biotechnology, University of Calcutta, Kolkata 700019, West Bengal, India.

Analytical Biochemistry
|July 23, 2013
PubMed
Summary

A novel polyvinyl chloride-based electrode can simultaneously monitor cholate, deoxycholate, and chenodeoxycholate. This versatile sensor offers a stable, reproducible alternative to individual bile ion electrodes.

Keywords:
Application in kineticsChanging electrode selectivityElectrode characterizationMultiple-bile-ion-sensing electrode

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Published on: May 3, 2015

Area of Science:

  • Analytical Chemistry
  • Biomedical Engineering

Background:

  • Bile acids are crucial in digestion and disease.
  • Monitoring specific bile ions requires selective sensors.
  • Current methods often involve multiple, less adaptable electrodes.

Purpose of the Study:

  • To develop a single electrode capable of sensing multiple common human bile ions.
  • To characterize the performance and stability of this novel sensor.
  • To evaluate its applicability in kinetic studies and critical micelle concentration measurements.

Main Methods:

  • Fabrication of a polyvinyl chloride-based membrane electrode.
  • Characterization of electrochemical response, including sub-Nernstian behavior.
  • Assessment of selectivity, stability, reproducibility, and response time.
  • Application in monitoring bile ion interactions with polyethylene glycol and determining rate constants.

Main Results:

  • The electrode successfully monitored cholate, deoxycholate, and chenodeoxycholate.
  • It demonstrated stability for 5 months with a low limit of detection (10 nM).
  • The electrode showed reproducible results and could switch selectivity, proving useful for kinetic analysis.

Conclusions:

  • A single, multi-bile-ion-sensing electrode was successfully developed and characterized.
  • This electrode offers a stable, reproducible, and adaptable alternative to multiple single-ion sensors.
  • Its application in kinetic studies highlights its potential for biological and chemical monitoring.