NDLI: Ni$_{0.5}$Zn$_{0.5}$Fe$_{2}$O$_{4}$ nanocomposite modified carbon paste electrode for highly sensitive and selective simultaneous electrochemical determination of trace amounts of mercury (II) and cadmium (II)

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Ni$_{0.5}$Zn$_{0.5}$Fe$_{2}$O$_{4}$ nanocomposite modified carbon paste electrode for highly sensitive and selective simultaneous electrochemical determination of trace amounts of mercury (II) and cadmium (II)

Content Provider	Springer Nature Link
Author	Soltani Felehgari, Farzaneh Madrakian, Tayyebeh Afkhami, Abbas Sayari, Shadieh
Copyright Year	2014
Abstract	A new chemically modified carbon paste electrode (CPE) was constructed and used for rapid, simple, accurate, highly sensitive, and selective simultaneous determination of cadmium and mercury using square wave anodic stripping voltammetry. The electrode was prepared using magnetic nickel zinc ferrite nanocomposite, as the modifier, in CPE. The cations Cd$^{2+}$ and Hg$^{2+}$ were determined after preconcentration at the surface of the modified electrode at −1.00 V vs. Ag/AgCl. Operational parameters such as pH, deposition potential, and deposition time were optimized for the purpose of determining traces of metal ions at pH 2.5. Compared with CPE, the stripping peak currents had a significant increase at the modified electrode. Under the optimal conditions, the limit of detection, based on three times the background noise, was 0.04 and 0.01 μmol L$^{−1}$ for Hg(II) and Cd(II) with a 150 s preconcentration, respectively. The effects of different cations and anions on the simultaneous determination of Cd$^{2+}$ and Hg$^{2+}$ were investigated. The results indicated that the electrode is highly selective. Furthermore, the present method was applied to the determination of Cd$^{2+}$ and Hg$^{2+}$ in waste-water and several plant foodstuff samples.
Starting Page	257
Ending Page	265
Page Count	9
File Format	PDF
ISSN	1735207X
Journal	Journal of the Iranian Chemical Society
Volume Number	12
Issue Number	2
e-ISSN	17352428
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-06-10
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Simultaneous determination Cd$^{2+}$ and Hg$^{2+}$ ions Analytical Chemistry Carbon paste modified electrode Physical Chemistry Magnetic nickel zinc ferrite nanocomposite Biochemistry Inorganic Chemistry Electrochemical sensor Organic Chemistry
Content Type	Text
Resource Type	Article
Subject	Chemistry

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