A series of experiments show that fluorescent sensors based on P(Fmoc-Ala-OH) and P(Fmoc-Thr-OH) could achieve the trace detection of Cr2O72− in agricultural products. 2. Results and Discussion 2.1. Electropolymerization of Monomers Fmoc-Ala-OH and Fmoc-Thr-OH In this work, we chose...