Abstract
ABSTRACT A rapid, reliable, sensitive, and multiplex colloidal gold immunochromatographic assay (CGIA) was developed for the simultaneous detection of three polyether ionophore antibiotics (PEs) in chicken muscle. The IC50 values of the optimized CGIA were 1.63, 1.94, and 1.18 ng/mL with a linear range of 0.87–3.04 ng/mL, 0.85–4.41 ng/mL, and 0.57–2.44 ng/mL for maduramicin (MAD), monensin (MON), and salinomycin (SAL), respectively. The cut-off values were 10, 5, and 5 ng/mL, respectively. The whole testing process was completed within 15 min. A parallel analysis in blind chicken muscle samples was conducted by liquid chromatography–tandem mass spectrometry (LC-MS/MS), the developed CGIA did not appear false-positive and false-negative. The results show that the established method could provide a rapid and effective approach for on-site screening and determination of PEs residues in chicken muscle samples.
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