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An enzyme immunoassay for the anabolic agent zeranol
1Department of Physiology and Biochemistry, Reading University, Berkshire, U.K.
Food Additives and Contaminants
|January 1, 1989
Summary
A new competitive enzyme immunoassay (EIA) accurately detects zeranol. This method offers a sensitive and precise alternative to radioimmunoassay for zeranol quantification.
Area of Science:
- Analytical Chemistry
- Biochemistry
- Immunology
Background:
- Zeranol is a synthetic estrogenic compound with applications in animal growth promotion.
- Accurate detection and quantification of zeranol are crucial for regulatory compliance and food safety.
- Existing methods like radioimmunoassay (RIA) are effective but involve radioactive materials.
Purpose of the Study:
- To develop and validate a competitive enzyme immunoassay (EIA) for zeranol detection.
- To establish the sensitivity, specificity, and precision of the developed EIA.
- To compare the performance of the EIA with established radioimmunoassay methods.
Main Methods:
- Development of a competitive enzyme immunoassay (EIA) using microtitration plates.
- Preparation of enzyme-labelled zeranol via the N-succinimidyl ester method.
- Utilizing zeranol-specific monoclonal antibodies for assay detection.
Main Results:
- The EIA demonstrated a working range of 10-800 pg/well for zeranol.
- The limit of detection was determined to be 10 pg/well with a coefficient of variation (CV) ≤10%.
- A high correlation coefficient (0.99) was observed when comparing EIA results with radioimmunoassay.
Conclusions:
- The developed competitive enzyme immunoassay (EIA) is a sensitive and precise method for zeranol detection.
- This EIA provides a viable, non-radioactive alternative to radioimmunoassay for zeranol quantification.
- The assay's performance characteristics make it suitable for routine analysis in relevant fields.
