Please use this identifier to cite or link to this item: http://ir.swu.ac.th/jspui/handle/123456789/13434
Title: Electrochemical sensors for the simultaneous determination of zinc, cadmium and lead using a Nafion/ionic liquid/graphene composite modified screen-printed carbon electrode
Authors: Chaiyo S.
Mehmeti E.
Žagar K.
Siangproh W.
Chailapakul O.
Kalcher K.
Keywords: Bismuth
Cadmium
Cadmium compounds
Drug products
Electrochemical sensors
Electrodes
Heavy metals
Lead
Liquids
Mass spectrometry
Metal ions
Metals
Potable water
Trace analysis
Trace elements
Voltammetry
Zinc
Zinc compounds
Analytical procedure
Bismuth film
Disposable electrodes
Drinking water samples
Fast electron transfer
Screen-printed carbon electrodes
Simultaneous determinations
Square wave anodic stripping voltammetry
Electrochemical electrodes
bismuth
cadmium
graphene
hydroxyapatite
ionic liquid
lead
mercury
zinc
anodic stripping potentiometry
Article
atomic absorption spectrometry
calibration
chemical modification
conductance
cyclic potentiometry
diffusion coefficient
electric conductivity
electrochemical analysis
electrode
electron transport
mass spectrometry
oxidation reduction reaction
priority journal
screen printed carbon eectrode
sensor
surface area
viscosity
water analysis
water sampling
Issue Date: 2016
Abstract: A simple, low cost, and highly sensitive electrochemical sensor, based on a Nafion/ionic liquid/graphene composite modified screen-printed carbon electrode (N/IL/G/SPCE) was developed to determine zinc (Zn(II)), cadmium (Cd(II)), and lead (Pb(II)) simultaneously. This disposable electrode shows excellent conductivity and fast electron transfer kinetics. By in situ plating with a bismuth film (BiF), the developed electrode exhibited well-defined and separate peaks for Zn(II), Cd(II), and Pb(II) by square wave anodic stripping voltammetry (SWASV). Analytical characteristics of the BiF/N/IL/G/SPCE were explored with calibration curves which were found to be linear for Zn(II), Cd(II), and Pb(II) concentrations over the range from 0.1 to 100.0 ng L-1. With an accumulation period of 120 s detection limits of 0.09 ng mL-1, 0.06 ng L-1 and 0.08 ng L-1 were obtained for Zn(II), Cd(II) and Pb(II), respectively using the BiF/N/IL/G/SPCE sensor, calculated as 3σ value of the blank. In addition, the developed electrode displayed a good repeatability and reproducibility. The interference from other common ions associated with Zn(II), Cd(II) and Pb(II) detection could be effectively avoided. Finally, the proposed analytical procedure was applied to detect the trace metal ions in drinking water samples with satisfactory results which demonstrates the suitability of the BiF/N/IL/G/SPCE to detect heavy metals in water samples and the results agreed well with those obtained by inductively coupled plasma mass spectrometry. © 2016 Elsevier B.V.
URI: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84990253595&doi=10.1016%2fj.aca.2016.03.026&partnerID=40&md5=e446ea4645ead3ded1179ea00ce70a4c
http://ir.swu.ac.th/jspui/handle/123456789/13434
ISSN: 32670
Appears in Collections:Scopus 1983-2021

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