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Related Experiment Videos

A sensitive and reliable quantification method for Bisphenol A based on modified competitive ELISA method.

Andre Kim1, Chun-Ri Li, Chun-Feng Jin

  • 1Department of Chemistry and Centre for Innovative Bio-physio sensor Technology, Pusan National University, Busan 609-735, Republic of Korea.

Chemosphere
|March 27, 2007
PubMed
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A new competitive ELISA method was developed for quantifying Bisphenol A (BPA), an estrogenic substance. This assay utilizes a novel antibody production and detection system, offering accurate BPA measurement without interfering interactions.

Area of Science:

  • Analytical Chemistry
  • Immunochemistry
  • Environmental Science

Background:

  • Bisphenol A (BPA) is recognized as a potential endocrine-disrupting chemical with estrogenic activity.
  • BPA quantification often requires conjugation to carrier proteins like Bovine Serum Albumin (BSA).
  • Existing detection methods can be complicated by interactions between BSA and anti-BSA antibodies.

Purpose of the Study:

  • To develop a modified competitive Enzyme-Linked Immunosorbent Assay (ELISA) for accurate Bisphenol A (BPA) quantification.
  • To create a novel immunoassay system that circumvents issues associated with BSA-BSA antibody interactions.

Main Methods:

  • Production of polyclonal antibodies against the bisphenolic structure using 4,4-Bis(4-hydroxyphenyl) valeric acid conjugated to BSA (BHPVA-BSA).

Related Experiment Videos

  • Development of a competitive ELISA employing BHPVA-BSA for antibody generation and BHPVA-Horseradish Peroxidase (BHPVA-HRP) for BPA determination.
  • Validation of the assay through recovery and variation assessments across multiple concentrations.

    • Main Results:

    • The developed competitive ELISA demonstrated high recovery rates for BPA, ranging from 96.3% to 107.2% across concentrations of 2-1000 ng/ml.
    • Intra-assay and inter-assay variations were acceptably low, recorded at 6.2%-9.8% and 10.1%-12.6%, respectively.
    • A reliable quantification range of 2-1000 ng/ml for BPA was established using quadratic curve regression.

    Conclusions:

    • The modified competitive ELISA is a highly effective tool for quantifying Bisphenol A (BPA).
    • This novel method successfully avoids the interference from BSA and anti-BSA polyclonal antibody interactions.
    • The assay provides accurate and reliable measurement of BPA within the specified concentration range.