Paper supported immunosensor for detection of antibiotics

► A sensitive paper immunosensor was developed for the analysis of antibiotic residues. ► The sensor showed a low limit of detection of 0.04 ng mL−1, a linear range of 0.2-125 ng mL−1 and satisfactory recoveries as well as high specificity. ► This sensor was low cost and simply preparation, and the dip-dry cycle method was used to manufacture large batches for practical applications.