A direct (non-competitive) immunoassay for gentamicin residues with an optical biosensor

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Abstract

Using sensor chip immobilized anti-gentamicin monoclonal antibodies in an optical biosensor (BIACORE 3000) resulted in the first single antibody based and label free noncompetitive immunoassay for the direct detection of residues of a low molecular weight compound in a food product. Calibration curves for gentamicin (Mw 466 Da) in buffer and milk showed 50% binding at 20 and 35 ng ml-1, respectively, which is well below the maximum residue limit of 100 ng ml-1.

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Haasnoot, W., & Verheijen, R. (2001). A direct (non-competitive) immunoassay for gentamicin residues with an optical biosensor. Food and Agricultural Immunology, 13(2), 131–134. https://doi.org/10.1080/09540100120055701

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