A Highly Sensitive Fluorescence Immunoassay for the Determination of Diethylstilbestrol

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Abstract:

A highly sensitive direct competitive fluorescence immunoassay (FIA) was developed for the determination of diethylstilbestrol (DES), based on the antibody coating format using biotin-streptavidin amplification system. In the assay, DES competed with biotinylated goat anti-rabbit IgG for the immobilized antibody, then the streptavidin-FITC was added to link to the biotinylated goat anti-rabbit IgG as a tracer. Under optimal conditions, the assay provided a wide analytical range of 0.001-10000 ng/mL with a detection limit of 2.91×10-4 ng/mL (R2=0.9943). This method was then applied to the determination of DES in chicken with satisfactory results

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622-625

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February 2013

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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