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Related Experiment Videos

Amperometric bienzymic sensor for aspartame

D Compagnone1, D O'Sullivan, G G Guilbault

  • 1Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata, Italy.

The Analyst
|May 1, 1997
PubMed
Summary
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A new enzyme electrode accurately detects aspartame in food. This biosensor uses immobilized enzymes and a hydrogen peroxide detector, achieving high sensitivity and reliable results in food sample analysis.

Area of Science:

  • Analytical Chemistry
  • Biosensor Technology
  • Enzyme Electrochemistry

Background:

  • Aspartame analysis is crucial for food quality control.
  • Developing sensitive and selective detection methods is an ongoing challenge.
  • Enzyme electrodes offer a promising platform for analyte determination.

Purpose of the Study:

  • To develop a novel amperometric enzyme electrode for aspartame determination.
  • To investigate the performance of the electrode using different assay methods.
  • To validate the electrode's applicability in real food samples.

Main Methods:

  • Covalent immobilization of alcohol oxidase and alpha-chymotrypsin onto a platinum electrode.
  • Utilizing a hydrogen peroxide electrode as the detection system.

Related Experiment Videos

  • Employing batch, flow-through, and flow injection analysis techniques.

    • Main Results:

    • Achieved excellent sensitivity with low detection limits (2 x 10(-7) mol l-1 in batch mode).
    • Successfully implemented strategies to mitigate interference from other compounds.
    • Demonstrated satisfactory recovery rates in seven different food samples.

    Conclusions:

    • The developed amperometric enzyme electrode provides a sensitive and reliable method for aspartame quantification.
    • The electrode shows potential for practical application in food analysis.
    • Enzyme immobilization and electrode design are key factors for enhanced biosensor performance.