Development of an Antibody Hapten‐Chip System for Detecting the Residues of Multiple Antibiotic Drugs*

Abstract: The abuse of antibiotic drugs during animal production remains a worldwide problem and the subsequent detection of the residues of various drugs present at low concentrations in complex biological matrices poses significant analytical challenges. The present study outlines a practical biochip assay system to identify antibiotic residues in different animal tissue extracts. The system uses a simple but efficient multiresidue sample extraction procedure to isolate the antibiotic residues which were then identified directly using high‐affinity monoclonal antibodies presented in a competitive immunoassay with conjugated antibiotic hapten‐chips. The hapten‐chip can analyze six samples each for eight antibiotics on a single chip within 3 h. The analytical results with both artificial positive standard samples and the incurred samples show that the antibody hapten‐chip system has a comparable accuracy and a similar sensitivity to a standard ultra performance liquid chromatography–mass spectrometry (MS)/MS assay. In conclusion, an effective analytical screening system based on antibody hapten‐chip was developed for detecting multiple antibiotic residues from multiple samples.