Lecture Preparation of Fluorescence Quantum Dots-Molecularly Imprinted Polymers and Detection of Teflubenzuron from Cabbage Samples

Abstract

Abstract A novel and sensitive quantum dots-molecularly imprinted polymer (MIPs-capped ZnS:Mn QDs) was synthesized for the rapid and specific recognition of teflubenzuron (TBZ) in water samples. Based on the fluorescence quenching via template analytes(TBZ) rebinding into the specific recognition cavities in the polymer, which allowed the TBZ to be sensed optically. Under optimal conditions, MIPs-capped ZnS:Mn QDs was applied to detection of TBZ, and a linear relationship was obtained over the concentration range 0-100mg/L with a correlation coefficient of 0.9981. Four structurally similar compounds were used for the selectivity test of MIPs-capped ZnS:Mn QDs. It was observed that the obtained composites can selectively rebind the template molecules(TBZ). In addition, MIPs-capped ZnS:Mn QDs were successfully applied to the detection of TBZ in cabbage samples. The recovery is between 90.35 and 97.09% with relative standard deviations in the range of 2.45–3.17%. The polymer developed in this work has the advantages of simple preparation and processing, fast response, low toxicity and good optical stability, which is very promising for the detection of TBZ.