Selective recognition of atrazine by molecularly imprinted polymer membranes. Development of conductometric sensor for herbicides detection

Potentiometric sensor based on molecularly imprinted polymer for determination of melamine in milk

“…The stable shape of complementary cavity for imprinted process cannot be maintained with low degree of cross-linking. However, high degree of cross-linking may result in difficulties in removal of template from the polymer and insolubility of MIP in the solvent [32]. To choose a suitable degree of cross-linking for polymerization process, the effect of the mole ratio of cross-linker/monomer was investigated in the range of 1-5.…”

New Materials in Electochemical Sensors for Pesticides Monitoring

“…Therefore, the development of an MIP-based conductimetric sensor, then, requires the preparation of the MIP as a membrane. In this sense Sergeyeva et al (1999a) developed an atrazine-sensitive conductimetric sensor using molecularly imprinted polymer membranes. These membranes were prepared by copolymerization of methacrylic acid and tri (ethylene glycol) dimetacrylate, in the presence of atrazine as a template.…”

Electrochemical Sensor Based on Biomimetic Recognition Utilizing Molecularly Imprinted Polymer Receptor

“…The molecularly imprinted fluorescent polymer quenched fluorescence in the presence of aqueous cAMP, whereas almost no effect was observed in the presence of structurally similar molecules. A conductometric sensor was fabricated based on the MIP membrane-modified electrode (Sergeyeva et al, 1999;Suedee et al, 2006). In the sensing principle, the conductivity decreased with an increase of bound analyte.…”

“…Although a conductometric transducer is normally difficult to distinguish among different compounds, selectivity and sensitivity are considerably improved by introducing a recognition element on the electrode surface. Sergeyva et al fabricated a conductometric sensor modified with an MIP membrane for template-atrazine, and reported the characterization of changes in the MIP membrane when the solvent, pH and functional monomer in polymerization were changed (Sergeyeva et al, 1999). The membrane containing 85% tri(ethylene glycol) dimethacrylate and 15% Oligourethane acrylate (OUA) demonstrate both a rapid and selective sensor response.…”