A colorimetric aptasensor for chloramphenicol in fish based on double-stranded DNA antibody labeled enzyme-linked polymer nanotracers for signal amplification

- A simple and visible colorimetric aptasensor based on substitutional detection strategy and double-stranded DNA antibody labeled enzyme-linked polymer.
- A CAP aptamer was used as the recognition CAP and gold nanoparticles connected by horseradish peroxidase was labeled to EnVision for the amplification of signal.
- The detection limit of colorimetric aptasensor was down to 0.015 ± 0.003 ng mL−1 of CAP.