期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 140, 期 1, 页码 92-97出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2009.04.001
关键词
Tricresyl; Copper nanoparticle; Carbon nanotube
资金
- Federal Aviation Administration's Office of Aerospace Medicine
- Air Transportation Center of Excellence for Airliner Cabin Environment Research
- NSF [CTS-0330189]
An electrochemical method has been developed for the determination of tricresyl phosphate (TCP) in aqueous media and air. Although TCP is not an electroactive species. conversion of TCP by acid hydrolysis to cresol enables electrochemical detection techniques to be exploited. Amperometric detection was performed using glassy carbon electrode (GC), glassy carbon electrode covered with multiwall carbon nanotubes (GC/MWNTs). and glassy carbon electrode covered with multiwall carbon nanotubes and copper (GC/MWNTs/Cu). It was demonstrated that the most favorable was GC/MWNT/Cu electrode since the electrodeposition of copper onto the MWNT led to enhancement of the analytical response and the possibility of detecting cresol at a low potential (0.54 V versus Ag/AgCl) and higher currents when compared with other electrodes. Scanning electron microscopy with chemical analysis by energy dispersive X-ray techniques was used for the characterization of the distribution of the Cu nanoparticles on the electrode surface. The linear range of cresol detection was 10-160 mu M with detection limit of 0.6 mu M. The method demonstrates an interesting and desirable alternative for TCP determinations and was used for the determination of TCP in aqueous media and three different concentrations of air samples. Published by Elsevier B.V.
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