Abstract
ABSTRACT A monoclonal antibody against carazolol (CRZ), 2F5, was generated for the construction of an indirect competitive enzyme-linked immunosorbent assay (ic-ELISA) and an immunochromatographic strip for detection of CRZ in milk and pig kidney samples. The antibody had a half-maximal inhibitory concentration of 0.29 ng/mL; its limit of detection was 0.068 ng/mL, and its linear range of detection was 0.137–0.638 ng/mL. For CRZ in milk samples and porcine kidney samples, the detection limits for this strip were 0.25 and 2.5 ng/mL, respectively. Analysis of CRZ in milk samples showed that the results obtained by immunochromatographic strip were consistent with those obtained by ic-ELISA. Therefore, the CG immunoassay is a sensitive screening method for semi-quantitative and qualitative detection of residual CRZ in milk and porcine kidney samples.
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