Enhanced Sensitivity of 4-Chlorophenol Detection by Use of Nitrobenzene as a Liquid Membrane over a Carbon Nanotube-Modified Glassy Carbon Electrode

Autor:	Mithran Somasundrum, Chatuporn Phanthong
Rok vydání:	2008
Předmět:	Detection limit Working electrode Materials science Inorganic chemistry Analytical chemistry chemistry.chemical_element Carbon nanotube Analytical Chemistry law.invention Nitrobenzene chemistry.chemical_compound Membrane chemistry law Electrode Electrochemistry Differential pulse voltammetry Carbon
Zdroj:	Electroanalysis. 20:1024-1027
ISSN:	1521-4109 1040-0397
DOI:	10.1002/elan.200704111
Popis:	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±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.
Databáze:	OpenAIRE
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