NDLI: Electrochemical determination of ascorbic acid at the surface of a graphite electrode modified with multi-walled carbon nanotubes/tetradecyltrimethylammonium bromide

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Electrochemical determination of ascorbic acid at the surface of a graphite electrode modified with multi-walled carbon nanotubes/tetradecyltrimethylammonium bromide

Content Provider	Springer Nature Link
Author	Motahary, Mahdie Ghoreishi, Sayed Mehdi Behpour, Mohsen Golestaneh, Mahshid
Copyright Year	2010
Abstract	A multi-walled carbon nanotubes (MWCNTs)–tetradecyltrimethylammonium bromide (TTAB) film-coated graphite electrode (GE) was fabricated, and the electrochemical oxidation of ascorbic acid (AA) was studied in Britton–Robinson (B–R) buffer (pH 7.0) using cyclic, square wave, and differential pulse voltammetry (CV, SWV, and DPV). An electroanalytical study of AA and acetaminophen (ACOP) and of several mixtures of these compounds in different ratios was made. A sensitive linear voltammetric response for AA was obtained for the concentration range of 5 × 10$^{−7}$ to 1.7 × 10$^{−4}$ mol L$^{−1}$, with a correlation coefficient of 0.992, and the detection limit for AA was found to be 1.1 × 10$^{−7}$ mol L$^{−1}$ using DPV. The relative standard deviation (RSD) was 2.7%, suggesting that the film electrode has excellent day-to-day reproducibility. The proposed voltammetric approach was also applied to the determination of the AA concentration in commercial tablets.
Starting Page	841
Ending Page	847
Page Count	7
File Format	PDF
ISSN	0021891X
Journal	Journal of Applied Electrochemistry
Volume Number	40
Issue Number	4
e-ISSN	15728838
Language	English
Publisher	Springer Netherlands
Publisher Date	2010-01-13
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ascorbic acid Graphite electrode Tetradecyltrimethylammonium bromide Multi-walled carbon nanotubes Voltammetry Industrial Chemistry/Chemical Engineering Physical Chemistry Electrochemistry
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Chemical Engineering Electrochemistry

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