Construction of a novel molecularly imprinted sensor for the determination of O,O-dimethyl-(2,4-dichlorophenoxyacetoxyl) (3'-nitrophenyl)methinephosphonate

摘要

A novel voltammetric sensor for O,O-dimethyl-(2,4-dichlorophenoxyacetoxyl)(3'-nitrophenyl)methinephosphonate (Phi-NO_2) based on molecularly imprinted polymer (MIP) film electrode is constructed by using sol-gel technology.The sensor responds linearly to Phi-NO_2 over the concentration range of 2.0 x 10~(-5) to l.0x 10~(-8)molL~(-1) and the detection limit is 1.0 x 10~(-9)molL~(-1) (S/N = 3).This sensor provides an efficient way for eliminating interferences from coexisting substances in the solution.The high sensitivity,selectivity and stability of the sensor demonstrates its practical application for a simple and rapid determination of Phi-NO_2 in cabbage samples.