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Amperometric immunosensor for nonylphenol determination based on peroxidase indicating reaction
G A Evtugyn1, S A Eremin, R P Shaljamova
1Chemistry Faculty of Kazan State University, 18, Kremlevskaya Street, 420008 Kazan, Russia. Gennady.Evtugyn@ksu.ru
Biosensors & Bioelectronics
|January 13, 2006
Summary
A new immunosensor detects nonylphenol (NP) using antibodies and horseradish peroxidase on a carbon electrode. This method offers sensitive detection of NP in environmental samples.
Area of Science:
- Electrochemistry
- Biosensors
- Environmental Science
Background:
- Nonylphenol (NP) is an endocrine-disrupting chemical pollutant.
- Accurate and sensitive detection methods for NP are crucial for environmental monitoring.
Purpose of the Study:
- To develop a novel immunosensor for the determination of nonylphenol (NP).
- To optimize the immunosensor's performance by investigating different mediators and incubation conditions.
Main Methods:
- Immobilization of specific antibodies and horseradish peroxidase on a carbon screen-printed electrode.
- Utilizing the peroxidase oxidation of mediators (Methylene Blue, hydroquinone, or iodide) for signal generation.
- Employing linear-sweep voltammetry for signal recording and analysis.
Main Results:
- The immunosensor demonstrated sensitive detection of nonylphenol (NP) within the range of 20 µg/L to 44 mg/L.
- A detection limit of 10 µg/L for NP was achieved.
- The sensitivity was influenced by the choice of mediator, its concentration, and incubation time.
- Cross-selectivity towards other phenolic compounds was evaluated.
Conclusions:
- A novel and sensitive immunosensor for nonylphenol (NP) detection has been successfully developed.
- The developed immunosensor shows potential for environmental monitoring of nonylphenol contamination.
- Further optimization of mediators and conditions can enhance the immunosensor's performance.