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Reference type: Journal
Authors: Wang Z, Wang K, Zhao L, Chai SG, Zhang JZ, Zhang XH, Zou QC
Article Title: A novel sensor made of Antimony Doped Tin Oxide-silica composite sol on a glassy carbon electrode modified by single-walled carbon nanotubes for detection of norepinephrine.
Publication date: 2017
Journal: Materials Science and Engineering: C
Volume: 80
Page numbers: 180-186.
DOI: 10.1016/j.msec.2017.03.227
Alternative URL: http://www.sciencedirect.com/science/article/pii/S0928493116313510

Abstract: In this study, we designed a novel molecularly imprinted polymer (MIP), Antimony Doped Tin Oxide (ATO)-silica composite sol, which was made using a sol-gel method. Then a sensitive and selective imprinted electrochemical sensor was constructed with the ATO-silica composite sol on a glassy carbon electrode modified by single-walled carbon nanotubes (SWNTs). The introduction of SWNTs increased the sensitivity of the MIP sensor. The surface morphology of the MIP and MIP/SWNTs were characterized by scanning electron microscopy (SEM), and the optimal conditions for detection were determined. The oxidative peak current increased linearly with the concentration of norepinephrine in the range of 9.99 x 10-8 M to 1.50 x 10-5 M, as detected by cyclic voltammetry (CV), the detection limit was 3.33 x 10-8 M (S/N = 3). In addition, the proposed electrochemical sensors were successfully applied to detect the norepinephrine concentration in human blood serum samples. The recoveries of the sensors varied from 99.67% to 104.17%, indicating that the sensor has potential for the determination of norepinephrine in clinical tests. Moreover, the imprinted electrochemical sensor was used to selectively detect norepinephrine. The analytical application was conducted successfully and yielded accurate and precise results
Template and target information: norepinephrine
Author keywords: MIP, ATO, Silica sol, Composite sol, Norepinephrine, SWNTs

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