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| Electropolymerization for Preparation of Melamine Molecularly Imprinted QCM Sensor Membrane and Its Characterization |
| ZHANG Xiao-gang;TAI Hong-xing;TIAN Yan-li;ZHU Qiu-jin;HU Ping |
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Abstract Molecularly imprinted membrane for direct modification of QCM sensor electrode was prepared by electropolymerization using BR buffer (pH 8.0) as the solvent and the electrolyte solution under the conditions of 0–1.6 V, 22, 4 mmol/L, 10 mmol/L and 18 mmol/L for polymerization voltage, the number of polymeric segments, template (melamine, MEL) concentration, monomer (methacrylic acid, MAA) concentration and o-PD (film-forming agent) concentration, respectively, The prepared membrane had good performance for frequency characterization of MEL with frequency shift of 59 Hz. Three replicates of the modified QCM sensor electrode showed variations in frequency characterization, suggesting its very poor stability, which may be closely related to manual sampling, the high level of environmental noise and the electrode itself. As a result, it is hard to establish a standard curve for accurate quantification of melamine.
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2013, Vol. 27 
