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Amperometric multidetection with composite enzyme electrodes.

A Guzman-Vázquez de Prada1, N Peña, C Parrado

  • 1Department of Analytical Chemistry, Faculty of Chemistry, Universidad Complutense de Madrid, E-28040 Madrid, Spain.

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Summary
This summary is machine-generated.

Composite biosensors enable simultaneous detection of multiple analytes like glucose and ethanol. This novel approach simplifies analysis in food and wine samples without complex separation techniques.

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Area of Science:

  • Electrochemistry
  • Biosensor Technology
  • Analytical Chemistry

Background:

  • Composite biosensors offer a platform for coimmobilizing multiple enzymes via physical inclusion.
  • This method avoids covalent linkages, simplifying biosensor fabrication.
  • Existing biosensors often require specific enzyme immobilization for single analyte detection.

Purpose of the Study:

  • To develop and evaluate a novel trienzyme composite biosensor for multianalyte detection.
  • To assess the feasibility of using composite biosensors for simultaneous glucose and ethanol determination.
  • To explore the application of parallel biosensor configurations for analyzing multiple analytes without chromatographic separation.

Main Methods:

  • Fabrication of graphite-Teflon rigid composite biosensors incorporating glucose oxidase (GOD), alcohol oxidase (AOD), and peroxidase (HRP) with ferrocene.
  • Amperometric measurements to evaluate the performance of the trienzyme biosensor.
  • Application of the biosensor for simultaneous determination of glucose and ethanol in sweet wine samples, with and without HPLC separation.
  • Evaluation of a parallel configuration using two composite biosensors for simultaneous analysis of glucose and ethanol in sweet wine, and glucose and lactic acid in red wine.

Main Results:

  • The trienzyme biosensor demonstrated comparable amperometric responses for glucose and ethanol to single-enzyme biosensors.
  • Successful simultaneous determination of glucose and ethanol in sweet wine was achieved.
  • The parallel biosensor configuration enabled the simultaneous detection of glucose and ethanol in sweet wine, and glucose and lactic acid in red wine, without chromatographic separation.

Conclusions:

  • Composite biosensors provide a versatile platform for multianalyte detection strategies.
  • The developed trienzyme biosensor and parallel biosensor configuration show promise for efficient and simultaneous analysis of multiple analytes in real-world samples.
  • This approach simplifies analytical procedures and enhances detection capabilities for various applications, including food and beverage analysis.