TITLE:
Flow Injection Amperometric Determination of Phenol and Chlorophenols at Single Wall Carbon Nanotube Modified Glassy Carbon Electrode
AUTHORS:
Negussie Negash, Hailemichael Alemu, Merid Tessema
KEYWORDS:
Single Wall Carbon Nanotube Modified Electrode; Phenol and Chlorophenols; Amperometry; Flow Injection Analysis
JOURNAL NAME:
American Journal of Analytical Chemistry,
Vol.5 No.3,
February
21,
2014
ABSTRACT:
Single wall carbon nanotube
modified glassy carbon electrode (SWCNT/GCE) was used for flow-injection analysis
(FIA) for phenolic compounds (phenol (P), 4-chlorophenol (CP),
2,4-dichlorophenol (DCP), 2,4,6-trichlorphenol (TCP) and
pentachlorophenol (PCP)). Experimental variables such as the detection
potential, flow rate and pH of the carrier solution, 0.1 M sodium acetate, were
optimized. Under these conditions, the designed electrode showed a
very good performance for the amperometric measurements, with no need to apply
a cleaning or pre-treatment procedure. The operational stability was tested
with 20 repetitive injections of each analyte and was found to be good. The
analytical performance of the SWCNT/GCE electrode under flow through conditions
was tested and was found to be impressive. When it is compared with other
enzymatic and non-enzymatic sensors, it shows wider
dynamic range for the detection of phenolic compounds with low limits of
detection. These results suggest that the method is quite useful for monitoring
and analyzing phenols and chlorophenols.