Electrocatalytic characteristic of carbon nanotubes/glutamine/nafion modified platinum electrode in development of sensor for determination of As(III)

Nor Azah Yusof, Daud Nurulhaidah, Tan Wee Tee, Abdul Halim Abdullah

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Electrochemical sensor for As(III) was prepared by using carbon nanotubes/amino acid modified platinum electrode using cyclic voltammetry. Experimental conditions such as pH, supporting electrolyte and scan rate were optimized. It was observed that the modified electrode has significant superior analytical performance in determination of As(III) compared to the unmodified electrode. The determination of As(III) by using modified electrode was reproducible with R.S.D of 7.3%. Determination of As(III) was observed to be free of metal ion interference at pH 4.0 acetate buffer. The electrocatalytic redox peak current of As(III) showed a linear response towards different concentration of As(III) and linear calibration curves were obtained in the range of 0.1×10-2 to 50.5×10-2 μM. The sensitivity response is 100 μA/μM with limit of detection 3.63×10-8 M. This developed method was applied for determination of As(III) in some real samples, such as industrial waste water from wood industry and electroplating industry and a good agreement was obtained between the proposed method and ICP-OES based on the analysis of the waste water samples.

Original languageEnglish
Pages (from-to)2385-2397
Number of pages13
JournalInternational Journal of Electrochemical Science
Volume6
Issue number7
Publication statusPublished - Jul 2011
Externally publishedYes

Fingerprint

Carbon Nanotubes
Platinum
Glutamine
Carbon nanotubes
Electrodes
Sensors
Wastewater
Industrial Waste
Electrochemical sensors
Industrial wastes
Electroplating
Electrolytes
Cyclic voltammetry
Metal ions
Amino acids
Industry
Wood
Buffers
Acetates
Calibration

ASJC Scopus subject areas

  • Electrochemistry

Cite this

Electrocatalytic characteristic of carbon nanotubes/glutamine/nafion modified platinum electrode in development of sensor for determination of As(III). / Yusof, Nor Azah; Nurulhaidah, Daud; Tee, Tan Wee; Abdullah, Abdul Halim.

In: International Journal of Electrochemical Science, Vol. 6, No. 7, 07.2011, p. 2385-2397.

Research output: Contribution to journalArticle

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