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Optical peroxide biosensor using the electrically controlled-release technique.

J Choi1, I H Lim, H H Kim

  • 1Department of Chemical Engineering, Sogang University, C.P.O. Box 1142, 100-611, Seoul, South Korea. jwchoi@ccs.sogang.ac.kr

Biosensors & Bioelectronics
|May 8, 2001
PubMed
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This study introduces an optical biosensor with an electrically controlled-release system for peroxide detection. The system precisely releases reagents, enabling accurate peroxide concentration measurements.

Area of Science:

  • Biomedical Engineering
  • Chemical Sensors
  • Analytical Chemistry

Background:

  • Peroxide concentration measurement is crucial in various applications.
  • Existing biosensors may lack precise control over reagent release.
  • Development of novel biosensing platforms is needed.

Purpose of the Study:

  • To develop an optical biosensor for peroxide concentration measurement.
  • To implement an electrically controlled-release system for precise reagent delivery.
  • To characterize the performance and analytical capabilities of the developed biosensor.

Main Methods:

  • Fabrication of an optical biosensor incorporating an electrically controlled-release system.
  • Utilizing a polymer complex responsive to pH changes induced by electric current for reagent release.

Related Experiment Videos

  • Enzyme-based detection of peroxide using 4-hydroxyphenylacetic acid (HPA) and fluorescence detection of the product DBDA.

    • Main Results:

    • The electrically controlled-release system successfully released HPA proportionally to the applied electric current.
    • A model was developed to predict the degradation velocity of the polymer complex and HPA release rate.
    • The biosensor demonstrated a linear analytical range of 0.025–1.0 mM for peroxide with a 20-minute response time.

    Conclusions:

    • The developed optical biosensor with an electrically controlled-release system offers a reliable method for peroxide detection.
    • The precise control over reagent release enhances the accuracy and efficiency of peroxide measurements.
    • The biosensor exhibits good repeatability and reproducibility, indicating its potential for practical applications.