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Related Concept Videos

Electrodeposition01:08

Electrodeposition

Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
Precipitation and Co-precipitation01:17

Precipitation and Co-precipitation

Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
Masking and Demasking Agents01:19

Masking and Demasking Agents

EDTA titrations may necessitate masking and demasking agents to temporarily protect a particular metal ion in a mixture from the EDTA reaction. These agents facilitate the sequential analysis of the metal ions by forming stable complexes with some—but not all—metal ions during certain steps.
There are many masking agents, such as cyanide, fluoride, triethanolamine, thiourea, and 2,3-bis(sulfanyl)propan-1-ol (formerly 2,3-dimercapto-1-propanol), with the masking agent chosen based on the metal...
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...
Types of Reversible Electrodes01:24

Types of Reversible Electrodes

For electrode reversibility to be maintained, all the reactants and products involved in the half-reaction must be present at the electrode. There are several types of reversible electrodes (half-cells).In metal-metal-ion electrodes, a metal balances electrochemically with a solution of its own ions. Examples are Cu2+|Cu and Zn2+|Zn. Metals that react with the solvent, like group 1 and most group 2 metals, which react with water, and zinc, which reacts with aqueous acidic solutions, cannot be...
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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Related Experiment Video

Updated: Jun 28, 2026

Accumulation and Analysis of Cuprous Ions in a Copper Sulfate Plating Solution
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Published on: March 20, 2019

A copper-selective electrode based on bis(acetylacetone)propylenediimine.

V K Gupta1, R N Goyal, N Bachheti

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

Talanta
|October 31, 2008
PubMed
Summary

This study developed a highly sensitive copper ion (Cu2+) sensor using a novel electrode membrane. The sensor demonstrates excellent Nernstian response and selectivity for accurate copper detection in various applications.

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Area of Science:

  • Electrochemistry
  • Analytical Chemistry
  • Materials Science

Background:

  • Copper ion (Cu2+) detection is crucial in environmental monitoring and industrial processes.
  • Development of selective and sensitive electrodes is essential for accurate potentiometric analysis.

Purpose of the Study:

  • To investigate the potentiometric response of Cu(2+)-selective electrodes.
  • To optimize electrode membrane composition for enhanced copper ion sensing.
  • To evaluate the sensor's performance in terms of Nernstian response, detection limit, pH range, and selectivity.

Main Methods:

  • Fabrication of ion-selective electrode membranes using PVC, bis(acetylacetone)propylenediimine (I), sodium tetraphenyl borate (NaTPB), and solvent mediators (DBBP, TBP, CN).
  • Potentiometric measurements to determine response characteristics, including Nernstian behavior and detection limits.
  • Assessment of electrode selectivity using fixed interference method and matched potential method.
  • Application of the sensor in potentiometric titration of copper ions with EDTA.

Main Results:

  • The optimal electrode membrane composition (PVC, I, DBBP, NaTPB in 5:100:200:6 w/w; mg) exhibited a Nernstian response (30.0mV/decade) for Cu(2+).
  • The sensor achieved a detection limit of 0.5 ppm within the concentration range of 1.0x10(-5) to 1.0x10(-1)M.
  • The operational pH range was determined to be 3.3-7.0, with good selectivity characteristics.
  • Successful application in potentiometric titration of copper ions with EDTA.

Conclusions:

  • The developed Cu(2+)-selective electrode demonstrates excellent performance for copper ion sensing.
  • The optimized electrode offers a sensitive, selective, and reliable method for copper analysis.
  • This sensor holds potential for various applications, including environmental and industrial monitoring.