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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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Updated: Jun 27, 2026

Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts
05:47

Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts

Published on: August 7, 2018

Manganese (II) selective PVC based membrane sensor using a Schiff base.

Vinod K Gupta1, Ajay K Jain, Gaurav Maheshwari

  • 1Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, India.

Talanta
|December 17, 2008
PubMed
Summary
This summary is machine-generated.

A novel sensor utilizing N,N

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Area of Science:

  • Analytical Chemistry
  • Electrochemistry
  • Materials Science

Background:

  • Ion-selective electrodes (ISEs) are crucial for monitoring metal ion concentrations.
  • Developing selective and sensitive ISEs for specific metal ions like Mn(2+) remains an active research area.
  • The ionophore N,N',N'',N'''-1,5,8,12-tetraazadodecane-bis(salicylaldiminato) (H(2)L) has shown potential for metal ion recognition.

Purpose of the Study:

  • To develop and optimize a potentiometric sensor for selective detection of Mn(2+) ions.
  • To investigate the influence of membrane composition on sensor performance.
  • To evaluate the sensor's response characteristics, including linearity, slope, response time, and selectivity.

Main Methods:

  • Preparation and electrochemical characterization of ion-selective membranes with varying compositions of H(2)L, PVC, NPOE, and NaTPB.
  • Potentiometric measurements to determine the sensor's response to Mn(2+) activity.
  • Selectivity testing against common alkali, alkaline, and heavy metal ions.
  • pH stability assessment.

Main Results:

  • The optimal membrane composition (10:150:150:10 H(2)L:PVC:NPOE:NaTPB) yielded a linear potential response over a wide concentration range (5.0x10(-6) to 1.0x10(-1)M).
  • The sensor exhibited a Nernstian slope of 30.0mV/decade and a rapid response time of 10 seconds.
  • The sensor demonstrated excellent selectivity for Mn(2+) over other tested metal ions and maintained performance within a pH range of 3.0-6.5.

Conclusions:

  • The developed potentiometric sensor based on H(2)L ionophore is highly selective and sensitive for Mn(2+) determination.
  • The optimized membrane composition provides excellent electrochemical performance.
  • This sensor offers a reliable method for direct potentiometric determination of manganese in various real-world samples.