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Abstract: A high selective voltammetric sensor for Cu2+ was introduced. Cu2+ selective molecular imprinted polymers (MIPs) and non-imprinted polymers (NIPs) were synthesized and then used for carbon paste (CP) electrode preparation. The MIP, incorporated in the carbon paste electrode, functioned as selectively recognition element and pre-concentrator agent for Cu2+ determination. The prepared electrode was used for Cu2+ measurement by the three steps procedure, including analyte extraction in the electrode, electrode washing and electrochemical measurement of Cu2+. The complete removal of Cu2+ from polymer was confirmed by IR and EDX. The MIP-CP electrode showed very high recognition ability in comparison to NIP-CP. It was shown that electrode washing after Cu2+ extraction led to enhanced selectivity. Some parameters affecting sensor response were optimized and then a calibration curve plotted. Two dynamic linear ranges of 7.0 x 10-8 to 1 x 10-6 mol/l and 1.0 x 10-6 to 1 x 10-4 mol/l were obtained. The detection limit of the sensor was calculated equal to 2.3 x 10-8 mol/l. This sensor was used successfully for Cu2+ determination in Yellow river water
Template and target information: copper ion, Cu(II)
Author keywords: Cu2+, molecularly imprinted polymer, voltammetric sensor, Carbon paste modified electrode