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Determination of Copper(II) and Cadmium(II) in Rice Samples by Anodic Stripping Square Wave Voltammetry Using Reduced Graphene Oxide/Polypyrrole Composite Modified Screen-printed Carbon Electrode


Paper Type 
 Contributed Paper
Title 
 Determination of Copper(II) and Cadmium(II) in Rice Samples by Anodic Stripping Square Wave Voltammetry Using Reduced Graphene Oxide/Polypyrrole Composite Modified Screen-printed Carbon Electrode
Author 
 Ploypailin Petsawi, Patrawadee Yaiwong, Rawiwan Laocharoensuk and Kontad Ounnunkad*
Email 
 suriyacmu@yahoo.com
Abstract:
 In this work, a polypyrrole (PPy)/reduced graphene oxide (rGO) composite has
been used to develop an electrochemical sensor for quantification of trace Cu(II) and Cd(II)
in rice samples via square-wave anodic stripping voltammetry (SWASV). To fabricate the
sensor, PPy/rGO was deposited on a screen-printed carbon electrode (SPCE) by simple
drop casting. The detection of such two heavy metals by SWASV method was achieved by
optimizing some parameters such as materials composition, pH of electrolyte, the deposition
time and the deposition potential. As a result, the modified electrode with PPy/rGO
nanocompsite exhibited reproducible response, high sensitivity and good stability for
Cd(II) and Cu(II) ions. Under optimal conditions, it provided high sensitivity, wide linear
ranges (0.10 to 500.0 gL-1 and 500 to 5000 mgL-1) with low detection limits (for Cu(II)
0.064 gL-1 and for Cd(II) 0.097 gL-1), and had excellent repeatability and good recoveries
(94% to 117%). This proposed PPy/rGO sensor was used to the determination of copper
and cadmium in rice samples.
Start & End Page 
 322 - 336
Received Date 
 2018-07-16
Revised Date 
Accepted Date 
 2018-08-17
Full Text 
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Keyword 
 graphene, polypyrrole, screen-printed carbon electrode, stripping voltammetry
Volume 
 Vol.46 No.2 (March 2019)
DOI 
Citation 
 Petsawi P., Yaiwong P. and Ounnunkad R.L.A., Determination of Copper(II) and Cadmium(II) in Rice Samples by Anodic Stripping Square Wave Voltammetry Using Reduced Graphene Oxide/Polypyrrole Composite Modified Screen-printed Carbon Electrode, Chiang Mai J. Sci., 2019; 46(2): 322-336.
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