Enzyme-linked immuno sorbent assay (ELISA) method for detecting melamine content in food
A technology of melamine content, which is applied in the research field of food safety supervision or food analysis, can solve the problem of insufficient detection sensitivity, and achieve the effect of simple sample processing, low test cost and large test volume
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[0075] 1. Preparation of melamine modification
[0076] Melamine is a small molecular compound without immunogenicity, and cannot directly immunize animals to produce antibodies. The molecular structure of melamine must be chemically modified reasonably and effectively so that it has active groups, so that it can be cross-linked with the carrier protein to obtain immunity Original and coated antigens. The present invention has prepared three kinds of melamine modifications, i.e. Hapten A, Hapten B and Hapten C:
[0077] 1) Synthesis of melamine hapten A (Hapten A)
[0078] Weigh 3~5mmol of 2-chloro-4,6-diamino-1,3,5-triazine (CAAT) into the reaction bottle, dissolve with anhydrous methanol, then add 5~10mmol of p-aminobenzoic acid to dissolve in 10~ 15mmol potassium hydroxide in anhydrous methanol. The reaction was refluxed for 5-12 hours until the CAAT reaction was complete. The reaction mixture was filtered and washed three times each with absolute ethanol and distilled ...
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