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Proceedings of the National Academy of Sciences of Belarus, Chemical Series

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Direct competitive enzyme immunoassay method for the determination of ochratoxin a in feeds and foods

https://doi.org/10.29235/1561-8331-2019-55-1-69-78

Abstract

A reagent kit EIA-OCHRATOXIN A for the determination of mycotoxin ochratoxin A in feeds and foods by a  direct  competitive  enzyme  immunoassay  using  microtitration  plate  has  been  developed  and  tested.  The  conjugate of ochratoxin A with horseradish peroxidase was synthesized using the mycotoxin aminoderivative joined to the carbohydrate chain of the enzyme. A monoclonal antibody to the mycotoxin was immobilized on the surface of plate wells through sheep anti-mouse antibodies. The evaluated parameters of the kit and metrological characteristics of the technique of measurements correspond to the modern level of immunoassay development and provide the determination of ochratoxin A content of agricultural products in a range of 5 to 375 mg/kg with proper accuracy and precision. The limit of quantitative determination of ochratoxin A in grain and cereal foods does not exceed 5 mg/kg.

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ISSN 1561-8331 (Print)
ISSN 2524-2342 (Online)