Abstract: An electrochemical sensor based on molecularly imprinted films for streptomycin sulfate (STR) measurement was investigated. The sensitive layer was prepared by electropolymerization of o-phenylenediamine (OPD) on a glassy carbon electrode in the presence of the template (STR), without derivatization during the preparation. It was shown the MIP sensor electroplymerizing STR with OPD in 1:4 molar ratio and extracting by 70% ethanol solution led to good performance via the analysis of the square wave voltammetry (SWV) with the K-3[Fe(CN)(6)] as a probe. A linear range of 2.5x10(-8) mol/L to 1.2x10(-8) mol/L was obtained between the peak current changes of SWV and the concentration of STR. The detection limit of the sensor was calculated to be 1.2x10(-8) mol/L. This sensor was used successfully for STR determination in spiked honey samples with the recovery ranging from 102.1%-119.2%
Template and target information: streptomycin sulfate, STR
Author keywords: Streptomycin sulfate, o-phenylenediamine, Molecularly imprinted polymers, electropolymerization, Electrochemical sensor