Glyphosate (Glyp) is a widely used herbicide, but its through prolonged and excessive spraying residues pose significant health risks. A ratiometric multimodal sensing platform combining fluorescence, colorimetry, and photothermal detection was developed for Glyp detection using a cerium/polyacrylic acid-modified porphyrin-based metal-organic framework (PCN@PAA-Ce). The detection strategy relies on the inhibition of acetylcholinesterase by Glyp, the oxidase-like activity of PCN@PAA-Ce, and the competition between enzymatic products and 3,3',5,5'-tetramethylbenzidine (TMB).
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