Please use this identifier to cite or link to this item: http://cmuir.cmu.ac.th/jspui/handle/6653943832/66023
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
Authors: Ploypailin Petsawi
Patrawadee Yaiwong
Rawiwan Laocharoensuk
Kontad Ounnunkad
Keywords: graphene
polypyrrole
screen-printed carbon electrode
stripping voltammetry
Issue Date: 2019
Publisher: Science Faculty of Chiang Mai University
Citation: Chiang Mai Journal of Science 46, 2 (Mar 2019), 322 - 336
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.
URI: http://it.science.cmu.ac.th/ejournal/dl.php?journal_id=9971
http://cmuir.cmu.ac.th/jspui/handle/6653943832/66023
ISSN: 0125-2526
Appears in Collections:CMUL: Journal Articles

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