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A surface plasmon resonance (SPR) biosensor inhibition immunoassay for determination of ractopamine (Rac) residue in pork was constructed by immobilising Rac derivative on the SPR-2004 biosensor chip. After extraction with perchloric acid, pork sample was cleaned by ethyl acetate and analyzed by SPR-2004 biosensor. The limit of detection (LOD) was 0.6μg/kg for pork sample. Recoveries of Rac were higher...
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