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Related Experiment Videos

Diamond paste based immunosensor for the determination of azidothymidine.

Raluca-Ioana Stefan1, Rahel Girmai Bokretsion

  • 1Department of Chemistry, University of Pretoria, Pretoria, South Africa. Raluca.stefan@chem.up.ac.za

Journal of Immunoassay & Immunochemistry
|September 5, 2003
PubMed
Summary

A novel amperometric immunosensor using diamond paste was developed for azidothymidine (AZT) detection. This reusable sensor provides reliable quantification of AZT in pharmaceutical formulations and raw materials.

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Area of Science:

  • Electrochemistry
  • Biosensors
  • Analytical Chemistry

Background:

  • Azidothymidine (AZT) is a crucial antiretroviral drug.
  • Accurate quantification of AZT is essential for pharmaceutical quality control.
  • Development of sensitive and reusable detection methods is needed.

Purpose of the Study:

  • To construct and validate a novel amperometric immunosensor for azidothymidine (AZT) detection.
  • To evaluate the sensor's performance in pharmaceutical formulations.
  • To assess the regenerability and reliability of the developed immunosensor.

Main Methods:

  • Fabrication of an amperometric immunosensor using diamond paste (diamond powder and paraffin oil) impregnated with anti-AZT antibodies.
  • Electrochemical detection of AZT at a potential of +240 mV vs. Ag/AgCl.

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  • Regeneration of the immunosensor surface through polishing.

    • Main Results:

    • The diamond paste-based immunosensor demonstrated reliable performance for AZT assay.
    • The sensor was effective for quantifying AZT in both raw material and pharmaceutical formulations.
    • The immunosensor surface could be easily regenerated by polishing for repeated use.

    Conclusions:

    • A robust and regenerable amperometric immunosensor for AZT detection has been successfully developed.
    • The diamond paste-based immunosensor offers a reliable method for AZT quantification in pharmaceutical analysis.
    • This approach provides a cost-effective and efficient tool for quality control of AZT.