Abstract
The contamination of chemical residues with great harm, long duration, and wide range of action has increasingly become the focus of research. Taking electrochemical sensor as research basis, a new three- electrode electrochemical sensor is designed based on the decomposition principle of chemical enzyme media. The electrode system of this sensor brings in the graphene nanocomposites with excellent conductivity and ZnSe quantum dots with good enzyme immobilization. It not only guarantees the activity of acetylcholinesterase, but also reduces the impedance and improves the accuracy and sensitivity of the detection system. By adopting the designed detection system, based on the inhibitory effects of chemical ions and enzyme media, it is available to test the chemical ions. The test results show that the average recovery rate of chemical ions is between 94% and 108% when using the optimal detection conditions determined in the dissertation, and the deviation value is less than 0.01, indicating that the sensor can accurately detect the actual chemical feedstock residues.
