A novel chitosan nanoparticle-schiff base modified carbon paste electrode as a sensor for the determination of Pb(II) in waste water

Semahat Kucukkolbasi, Zehra Özden Erdoǧan, Jiri Barek, Mustafa Sahin, Nuriye Kocak

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13 Citations (Scopus)

Abstract

This paper describes the preparation and electrochemical application of a modified carbon paste electrode with a new kind of chitosan nanoparticle-Schiff base for the determination of Pb(II) ions in waste water using differential pulse anodic stripping voltammetry (DPASV). Firstly a new kind of chitosan nanoparticle-Schiff base (CNSB) was synthesized by chitosan nanoparticle reaction with 2,4-dihydroxybenzaldehyde. CNSB structure was characterized by FT-IR spectroscopy, elemental analysis, particle size and zeta potential. Afterwards, a novel, simple and effective chemically modified carbon paste electrode with CNSB was prepared and characterized using scanning electronic microscopy (SEM-EDX) and anodic stripping voltammetry. The modified electrode showed only one oxidation peak in the anodic scan at -0.35 V (vs. Ag/AgCl) for the oxidation of Pb(II). The electrochemical properties and applications of the modified electrode, including the pH, supporting electrolyte, preconcentration time, reduction potential and time, and percentage of modifier were investigated. The best voltammetric response was observed for a paste composition of 73.7% (w/w) of graphite powder, 5.3% (w/w) of chitosan and 21% (w/w) of paraffin oil, with 0.2 mol L- NaAc solution at pH 6.0 as supporting electrolyte, preconcentration time of 600 s, a reduction potential of -0.1 V and reduction time of 10 s. The new electrode displays excellent response to Pb(II) which is linear in the range from 1×10-6 to 1×10-4 mol L-, with a correlation coefficient of 0.998 and a detection limit of 7.24×10-7 mol L-.

Original languageEnglish
Pages (from-to)2164-2181
Number of pages18
JournalInternational Journal of Electrochemical Science
Volume8
Issue number2
Publication statusPublished - 1 Feb 2013
Externally publishedYes

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Keywords

  • Carbon paste electrode
  • Chitosan nanoparticles
  • Lead (II) sensor
  • Schiff base
  • Voltammetry

ASJC Scopus subject areas

  • Electrochemistry

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