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Lanthanum(IlI) PVC membrane electrodes based on 1,3,5-trithiacyclohexane
Mojtaba Shamsipur1, Mohammad Yousefi, Morteza Hosseini
1Department of Chemistry, Razi University, Kermanshah, Iran. mshamsipur@yahoo.com
Analytical Chemistry
|November 16, 2002
Summary
New electrodes based on 1,3,5-trithiacyclohexane offer highly selective determination of Lanthanum ions (La3+). These electrodes provide fast, stable, and sensitive measurements for La3+ detection in various applications.
Area of Science:
- Analytical Chemistry
- Electrochemistry
- Materials Science
Background:
- Accurate determination of Lanthanum ions (La3+) is crucial in various fields.
- Development of selective and sensitive ion-selective electrodes (ISEs) is an ongoing challenge.
Purpose of the Study:
- To develop novel plasticized polymeric membrane (PPME) and membrane-coated graphite (MCGE) electrodes.
- To achieve highly selective and sensitive determination of La3+ ions.
Main Methods:
- Synthesis of electrodes utilizing 1,3,5-trithiacyclohexane.
- Potentiometric measurements to evaluate electrode performance.
- Testing selectivity against various interfering ions and pH stability.
Main Results:
- Both PPME and MCGE electrodes exhibited Nernstian responses over wide concentration ranges.
- Low limits of detection were achieved (5.0 x 10(-6) M for PPME, 2.0 x 10(-8) M for MCGE).
- Electrodes demonstrated excellent selectivity for La3+ and stability for over 6 months.
Conclusions:
- The developed 1,3,5-trithiacyclohexane-based electrodes are highly selective and sensitive for La3+ determination.
- These electrodes show practical utility in potentiometric titrations and fluoride analysis in mouthwash.