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  • Title: An immunoaffinity column for the determination of peanut protein in chocolate.
    Author: Newsome WH, Abbott M.
    Journal: J AOAC Int; 1999; 82(3):666-8. PubMed ID: 10367386.
    Abstract:
    An immunoaffinity column was prepared from rabbit polyclonal antiserum for the determination of peanut protein from food matrixes. The anti-peanut immunoglobulin G was isolated from antiserum by affinity chromatography on a column coupled with peanut protein and then attached to an AminoLink gel. The column was applied to the determination of peanut protein in chocolate after extraction, immunoaffinity chromatography, and enzyme-linked immunosorbent assay (ELISA). Overall recoveries from chocolate spiked with 0.2-3.2 micrograms/g of peanut protein averaged 77% (range, 72-84%), and the minimum detection limit was 0.1 microgram/g. Chromatography of extracts with the column improved detection limit and eliminated the matrix effect experienced with direct ELISA of chocolate extracts.
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