Detection of three cypermethrin residues by fluorescence and molecular imprinting with allyl chloride and Acrylamide

• 1、chemistry and chemical engineering School, Jiang Su University

Abstract：A fluorescent molecularly imprinted polymer (FMIP) sensor is fabricated via precipitation polymerisation. The MIP sensor is prepared upon copolymerisation of acrylamide with a small quantity of allyl fluorescein in the presence of LC to form recognition sites. The as-synthesised microspheres exhibited spherical shape, high fluorescence intensity and highly selective recognition. Under optical conditions, polymer microspheres are successfully applied to selectively and sensitively detect LC, and a linear relationship described by the Stern-Volmer equation (I0/I) - 1 = 0.29oCC - 0.00608 with a correlation coefficient of 0.9936. A lower limit of detection (LOD) is found to be 0.004 nM. The results of practical detection suggested that the developed method is satisfactory for determination of LC in honey samples. The FMIP sensor has certified that they can be reused for not less than 5 times without remarkably loss of signal intensity.

Keywords： analytical chemistry fluorescent sensor pyrethroid