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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...
Potentiometry: Types of Electrodes01:19

Potentiometry: Types of Electrodes

Reference electrodes serve as a stable reference point for potentiometric measurements, while indicator and working electrodes react to variations in the composition of a solution.
The Standard Hydrogen Electrode (SHE) is a widely used reference electrode that maintains zero potential across all temperatures. However, its need for a continuous hydrogen gas supply renders it impractical for everyday use.
An alternative to SHE is the Saturated Calomel Electrode (SCE). This electrode features an...
Potentiometry: Overview01:06

Potentiometry: Overview

Potentiometry is an analytical technique that measures the potential difference between two electrodes in an electrochemical cell without drawing any significant current that could alter the solution's composition. This method employs an indicator electrode, which exchanges electrons with the analyte solution, and a reference electrode with a constant potential. Each electrode is immersed in a solution comprised of two half-cells. In a conventional setup, the reference electrode serves as the...
Controlled-Potential Coulometry: Electrolytic Methods01:17

Controlled-Potential Coulometry: Electrolytic Methods

Controlled-potential coulometry, also known as potentiostatic coulometry, employs a three-electrode system in which the working electrode's potential is precisely regulated using a potentiostat. Platinum working electrodes are utilized for positive potentials, while mercury pool electrodes are favored for extremely negative potentials. The platinum counter electrode is separated from the analyte using a membrane or salt bridge to avoid interference in the analysis.
The chosen potential ensures...
Standard Electrode Potentials03:02

Standard Electrode Potentials

On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...

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Related Experiment Video

Updated: May 16, 2026

Multi-analyte Biochip (MAB) Based on All-solid-state Ion-selective Electrodes (ASSISE) for Physiological Research
08:03

Multi-analyte Biochip (MAB) Based on All-solid-state Ion-selective Electrodes (ASSISE) for Physiological Research

Published on: April 18, 2013

Improved potentiometric response of all-solid-state Pb(2+)-selective electrode.

Shunyang Yu1, Qun Yuan, Fuhai Li

  • 1Key Laboratory of Coastal Zone Environmental Processes, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS), YICCAS, Yantai, Shandong 264003, PR China. syyu@yic.ac.cn

Talanta
|November 20, 2012
PubMed
Summary
This summary is machine-generated.

Adjusting ion flux improves lead-selective electrodes. Appropriate conditioning enhances reproducibility and linear working range for accurate lead determination in real water samples.

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Area of Science:

  • Electrochemistry
  • Analytical Chemistry
  • Materials Science

Background:

  • Ion-selective electrodes (ISEs) are crucial for ion analysis.
  • Zero-current ion flux significantly impacts ISE performance.
  • All-solid-state ISEs offer advantages in practical applications.

Purpose of the Study:

  • To enhance the analytical performance of all-solid-state lead(II) ion-selective electrodes (Pb2+ ISEs).
  • To investigate the effect of transmembrane ion flux on electrode characteristics.
  • To establish the relationship between conditioning solutions and electrode performance across various sample matrices.

Main Methods:

  • Fabrication of all-solid-state Pb2+ ISEs.
  • Optimization of conditioning solutions.
  • Evaluation of electrode response and linear working range.
  • Testing electrode utility in real water samples.

Main Results:

  • Adjusting transmembrane ion flux improved electrode performance.
  • Appropriate conditioning solutions ensured good reproducibility within the linear working range.
  • The developed electrodes successfully determined Pb2+ concentrations in real water samples.

Conclusions:

  • Transmembrane ion flux is a key factor in optimizing ISE analytical performance.
  • Conditioning protocols are critical for achieving reliable and reproducible results.
  • The improved Pb2+ ISEs demonstrate practical applicability for environmental monitoring.