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Published on: April 18, 2013
A polystyrene-based membrane electrode sensitive to molybdate ions
S K Srivastava1, A K Sharma, C K Jain
1Chemistry Department, Roorkee University, Roorkee (U.P., India.
Talanta
|April 1, 1983
Summary
A new zirconium oxide membrane electrode accurately detects molybdate ions in a specific pH range. This electrode offers a fast response and long-term usability for molybdate determination.
Area of Science:
- Analytical Chemistry
- Electrochemistry
- Materials Science
Background:
- Accurate determination of molybdate ions is crucial in various chemical and environmental analyses.
- Development of selective and stable ion-selective electrodes is an ongoing area of research.
Purpose of the Study:
- To develop and characterize a novel polystyrene-based zirconium oxide membrane electrode for molybdate ion determination.
- To evaluate the electrode's performance, including response time, stability, and interference effects.
Main Methods:
- Fabrication of a zirconium oxide membrane electrode using a polystyrene matrix.
- Potentiometric measurements to determine molybdate ion concentration within a defined pH range.
- Assessment of electrode response time, operational stability, and interference from other anions.
Main Results:
- The electrode demonstrated reliable performance for molybdate ion determination in the concentration range of 0.5-10(-3)M.
- The optimal pH range for the electrode was found to be 7-11.
- A rapid response time of approximately 20 seconds was observed, with electrode usability maintained for at least 6 months.
- The electrode also proved effective as an indicator electrode in molybdate titrations.
- Interference studies indicated that univalent anions posed a greater challenge than bivalent and multivalent anions.
Conclusions:
- The developed zirconium oxide membrane electrode is a promising tool for the selective and efficient determination of molybdate ions.
- Its rapid response, long-term stability, and applicability in titrations highlight its practical utility in analytical chemistry.
- Understanding anion interference is key for optimizing its application in complex matrices.
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