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7 results on '"Soltani-Shahrivar, Morteza"'

6. Construction of Modified Carbon Paste Electrode for Highly Sensitive Simultaneous Electrochemical Determination of Trace Amounts of Copper (II) and Cadmium (II).

Author

Afkhami, Abbas, Soltani‐Shahrivar, Morteza, Ghaedi, Hamed, and Madrakian, Tayyebeh

Subjects
*CARBON electrodes, *ELECTROCHEMICAL analysis, *COPPER, *CADMIUM, *RADIOISOTOPES, *NANOPARTICLES, *SCHIFF bases
Abstract

A chemically modified electrode was constructed for rapid, simple, accurate, selective and highly sensitive simultaneous determination of Cu(II) and Cd(II) using square wave anodic stripping voltammetry. The electrode was prepared by incorporation of SiO2 nanoparticles, coated with a newly synthesized Schiff base, in carbon paste electrode. The limit of detection was found to be 0.28 ng mL−1 and 0.54 ng mL−1 for Cu(II) and Cd(II), respectively. The proposed chemically modified electrode was used for the determination of copper and cadmium in several foodstuffs and water samples. [ABSTRACT FROM AUTHOR]

Published
2016
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7. Selective and Sensitive Electrochemical Determination of Trace Amounts of Mercury Ion in Some Real Samples Using an Ion Imprinted Polymer Nano-Modifier

Author

Afkhami, Abbas, Madrakian, Tayyebeh, Soltani-Shahrivar, Morteza, Ahmadi, Mazaher, and Ghaedi, Hamed

Abstract

A new chemically modified carbon paste electrode was constructed and used for rapid, simple, accurate, sensitive and highly selective determination of mercury (II) ion using square wave stripping voltammetry. The carbon paste electrode was modified by an ion imprinted polymer. Compared with carbon paste electrode, the stripping peak currents had a significant increase at the modified electrode. Under the optimized conditions (deposition potential, −0.600 V vs. Ag/AgCl; deposition time, 250 s; resting time, 10 s; SW frequency, 80 Hz; pulse amplitude, 70 V; dc voltage step height, 5.8 mV), the detection limit was found to be 0.04 ng mL−1for the determination of Hg2+ion over a wide linear range from 0.20 to 1600.0 ng mL−1. The effect of different cations and anions on the determination of the target ion was studied, and it was found that the electrode is highly selective for the determination of Hg2+ion. Furthermore, the present method was successfully applied to the determination of Hg2+in water and some foodstuff samples.

Published
2016
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