Enhanced sensitivity of 4-chlorophenol detection by use of nitrobenzene as a liquid membrane over a carbon nanotube-modified glassy carbon electrode
Journal article
Authors/Editors
Strategic Research Themes
No matching items found.
Publication Details
Author list: Phanthong C., Somasundrum M.
Publisher: Wiley
Publication year: 2008
Journal: Electroanalysis (1040-0397)
Volume number: 20
Issue number: 9
Start page: 1024
End page: 1027
Number of pages: 4
ISSN: 1040-0397
eISSN: 1521-4109
Languages: English-Great Britain (EN-GB)
View in Web of Science | View on publisher site | View citing articles in Web of Science
Abstract
The analytical utility of nitrobenzene as a liquid membrane for the detection of hydrophobic compounds was examined with a glassy carbon electrode, using 4-chlorophenol as the model analyte. Electrochemical experiments indicated a large partition coefficient for the entry of 4-chlorophenol into the nitrobenzene (7.6 ื 102 ฑ 1.5 ื 102). This was combined with an increase in effective electrode area by coating with single-walled nanotubes. Differential pulse voltammetry produced a linear response across the range 0.3 nM to 1.5 nM with a sensitivity of 1.1 ื 10-5 A nM-1 cm-2. To the best of our knowledge, this limit of detection for phenol is lower than other nonenzymatic modifications of carbon. ฉ 2008 Wiley-VCH Verlag GmbH & Co. KGaA.
Keywords
Differential pulse voltammetry, Liquid membrane, Phenol, Preconcentration, Single-walled nanotubes
Contact Information