Electrochemical Study of Carbon Nanotubes/Nanohybrids for Determination of Metal Species Cu and Pb in Water Samples

Overview

Journal J Anal Methods Chem

Publisher Wiley

Specialty Chemistry

Date 2016 Nov 25

PMID 27882263

Citations 2

Authors

Andrea Claudia Oliveira Silva

Luis Carlos Ferreira de Oliveira

Angladis Vieira Delfino

Mario Roberto Meneghetti

Fabiane Caxico de Abreu

Affiliations

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Abstract

The use of nanomaterials, such as nanoparticles and nanotubes, for electrochemical detection of metal species has been investigated as a way of modifying electrodes by electrochemical stripping analysis. The present study develops a new methodology based on a comparative study of nanoparticles and nanotubes with differential pulse anodic stripping voltammetry (DPASV) and examines the simultaneous determination of copper and lead. The glassy carbon electrode modified by gold nanoparticles demonstrated increased sensitivity and decreased detection limits, among other improvements in analytical performance data. Under optimized conditions (deposition potential -0.8 V versus Ag/AgCl; deposition time, 300 s; resting time, 10 s; pulse amplitude, 50 mV; and voltage step height, 4 mV), the detection limits were 0.2279 and 0.3321 ppb, respectively, for determination of Pb and Cu. The effects of cations and anions on the simultaneous determination of metal ions do not exhibit significant interference, thereby demonstrating the selectivity of the electrode for simultaneous determination of Pb and Cu. The same method was also used to determine Cu in water samples.

Citing Articles

Voltammetric determination of cadmium(II), lead(II) and copper(II) with a glassy carbon electrode modified with silver nanoparticles deposited on poly(1,8-diaminonaphthalene).

Hassan K, Elhaddad G, AbdelAzzem M Mikrochim Acta. 2019; 186(7):440.

PMID: 31197477 DOI: 10.1007/s00604-019-3552-0.

Voltammetric Behavior, Identifying and Quantitatively Determining Iron-Based Nanoparticles, and Evaluating Their Stability in Simulated Solutions of Gastric Juice.

Dubova N, Slepchenko G, Khlusov I, Ostapenko M, Nesterov E J Anal Methods Chem. 2018; 2018:7319067.

PMID: 30155341 PMC: 6093071. DOI: 10.1155/2018/7319067.

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