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Title

EVALUATION OF NICOTINE SENSOR BASED ON COPPER NANOPARTICLES AND CARBON NANOTUBES

Pages

 Start Page 237 | End Page 242

Abstract

 An electrochemical sensor was prepared to detect NICOTINE by depositing COPPER NANOPARTICLES (Cu NPs) on the surface of a glassy carbon electrode (GCE) modified with MULTI-WALLED CARBON NANOTUBEs (MWNTs). The modified electrode was characterized by scanning electron microscopy and CYCLIC VOLTAMMETRY. The novel-modified sensor exhibited effective electrocatalytic activities toward anodic oxidation of NICOTINE. Calibration plot showed two linear regions with different sensitivity, 1.121 (r2=0.982) in the range from 19 10-6 to 9 9 10-5 M and 0.164 (r2=0.982) from 1 9 10-4 M up to 1 9 10-3 M. The detection limit was 1lM. For six parallel detections of 1 mM NICOTINE, the relative standard deviation was 5.68 %, suggesting that the film-modified electrode had good reproducibility.Experimental parameters affecting the sensor response such as pH, modifier concentration and electrodeposition scan rate were found to be optimum at 7.0, 2 mg mL-1 and 80 mV s-1, respectively.

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