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Coated wire chromium(III) ion-selective electrode based on azamacrocycles
Aparna Sil1, Vijaykumar S Ijeri, Ashwini K Srivastava
1Department of Chemistry, University of Mumbai, Vidyanagari, Santacruz (E), 400 098 Mumbai, Maharashtra, India.
Analytical and Bioanalytical Chemistry
|June 25, 2004
Summary
A new coated wire ion-selective electrode (CWISE) using tetratosyltetraaza 12C4 shows excellent performance for Cr(III) detection. This Cr(III) sensor offers a wide linear range and stable response in various industrial samples.
Area of Science:
- Electrochemistry
- Analytical Chemistry
- Materials Science
Background:
- Ion-selective electrodes (ISEs) are crucial for chemical analysis.
- Developing selective and sensitive electrodes for specific metal ions, like Cr(III), remains an active research area.
- Coated wire ion-selective electrodes (CWISEs) offer a robust platform for electrochemical sensing.
Purpose of the Study:
- To explore tetraazacyclotetradecane derivatives as electroactive materials for Cr(III) detection.
- To develop and optimize a coated wire ion-selective electrode (CWISE) for Cr(III) ions.
- To evaluate the performance and selectivity of the developed Cr(III) CWISE.
Main Methods:
- Synthesis and characterization of tetraazacyclotetradecane derivatives.
- Fabrication of CWISEs using tetratosyltetraaza 12C4, dibutyl phthalate, and poly(vinyl chloride).
- Electrochemical measurements to determine Nernstian response, working pH range, and selectivity coefficients.
- Validation of the electrode by analyzing real-world samples (electroplating baths, chromating, effluent).
Main Results:
- Tetratosyltetraaza 12C4 demonstrated effective electroactivity for Cr(III) sensing.
- The optimized CWISE exhibited a linear Nernstian response from 1 x 10(-1) to 1 x 10(-7) M Cr(III).
- The electrode operated effectively within a pH range of 1.8-5.5 and showed good selectivity against interfering ions.
- Analysis of industrial samples yielded results comparable to conventional methods and AAS.
Conclusions:
- Tetratosyltetraaza 12C4 is a promising electroactive material for Cr(III) CWISE development.
- The developed Cr(III) CWISE offers a reliable and efficient method for monitoring Cr(III) in environmental and industrial settings.
- This electrode provides a viable alternative to traditional analytical techniques for Cr(III) determination.