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Reference type: Journal
Authors: Zhang HC, Liu GY, Chai CY
Article Title: A novel amperometric sensor based on screen-printed electrode modified with multi-walled carbon nanotubes and molecularly imprinted membrane for rapid determination of ractopamine in pig urine.
Publication date: 2012
Journal: Sensors and Actuators B: Chemical
Volume: 168
Issue: (1)
Page numbers: 103-110.
DOI: 10.1016/j.snb.2012.03.032
Alternative URL: http://www.sciencedirect.com/science/article/pii/S092540051200295X

Abstract: Screen-printed electrodes were modified with multi-wall carbon nanotubes (MWCNT) and molecularly imprinted membranes (MIM) were directly synthesized on these modified electrodes using the in situ thermal polymerization techniques. The sensing system was easily established by connecting the screen-printed electrode modified with MWCNT-MIM to an electrochemical analyzer through an electrode slot. The signal for the determination of ractopamine was recorded using differential pulse voltammetry (DPV) and the optimization for the experimental conditions was also conducted. The results showed that the response of the sensor to concentration of ractopamine displayed a linear correlation over a range from 20 nM to 200 nM with a detection limit of 6 nM, demonstrating favorable sensitivity and selectivity for the detection of ractopamine. The recoveries reached 87.7 - 96.9% based on pig urine samples
Template and target information: ractopamine
Author keywords: Ractopamine, Multi-walled carbon nanotubes, Screen-imprinted electrodes, molecularly imprinted membranes


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