Journal
THIN SOLID FILMS
Volume 519, Issue 2, Pages 928-933Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2010.09.013
Keywords
Rutin; Single walled carbon nanotubes; Carbon ionic liquid electrode; Cyclic voltammetry; Differential pulse voltammetry
Categories
Funding
- National Natural Science Foundation of China [50802032, 21075071]
- Young Scientist Chenguang Project of Wuhan
- Shandong Province Natural Science Foundation [ZR2009BL017]
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The single-walled carbon nanotubes (SWCNTs) modified carbon ionic liquid electrode (CILE) was designed and further used for the voltammetric detection of rutin in this paper CILE was prepared by mixing graphite powder with ionic liquid (IL) 1-butyl-3-methylimidazolium tetrafluoroborate and liquid paraffin together Based on the interaction of SWCNTs with IL present on the electrode surface a stable SWCNTs film was formed on the CILE to get a modified electrode denoted as SWCNTs/CILE The characteristics of SWCNTs/CILE were recorded by different methods including cyclic voltammetry electrochemical Impedance spectroscopy and scanning electron microscopy The electrochemical behaviors of rutin on the SWCNTs/CILE were investigated by cyclic voltammetry and differential pulse voltammetry Due to the specific interface provided by the SWCNTs-IL film the electrochemical response of rutin was greatly enhanced with a pair of well-defined redox peaks appeared in pH 2 5 phosphate buffer solution The oxidation peak currents showed good linear relationship with the rutin concentration in the range from 1 0 x 10(-7) to 8 0 x 10(-4) mol/L with the detection limit as 7 Ox 10(-8) mol/L (3 sigma) The SWCNTs/CILE showed the advantages such as excellent selectivity improved performance good stability and it was further applied to the rutin tablets sample detection with satisfactory results (C) 2010 Elsevier B V All rights reserved
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