Electrochemical Characteristic of Biotinyl Somatostatin-14/Nafion Modified Gold Electrode in Development of Sensor for Determination of Hg(II)

Daud Nurulhaidah, Nor Azah Yusof, Siti Mariam Mohd Nor

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Electrochemical sensor for Hg(II) has been developed using Biotinyl Somatostatin-14 peptide modified gold electrode utilizing nafion as the immobilizing agent. Experimental conditions such as pH, supporting electrolyte and scan rate were optimized. Detection of mercury using Biotinyl Somatostatin-14 peptide/Nafion has been observed to be optimum under acidic conditions. Good relative standard deviation of 3.7% has been obtained indicating reliability of the detection system. A linear calibration plot in the range of 40-170 μgL-1 was obtained with sensitivity value of 1×10-10 AμM-1. Limit of detection (LOD) obtained is 0.4 μgL-1 which is below the WHO guidelines for drinking water. The scan rate study showed that the process is a complex surface process, mostly involving an adsorption process. This developed method was applied for determination of Hg(II) in actual waste water samples and a good agreement was obtained between the proposed method and ICP-MS based on the analysis of the waste water samples.

Original languageEnglish
Pages (from-to)10086-10099
Number of pages14
JournalInternational Journal of Electrochemical Science
Volume8
Issue number7
Publication statusPublished - 2013
Externally publishedYes

Fingerprint

Somatostatin
Gold
Peptides
Wastewater
Electrochemical sensors
Electrodes
Sensors
Mercury
Potable water
Drinking Water
Electrolytes
Calibration
Adsorption
perfluorosulfonic acid

Keywords

  • Electrochemical sensor
  • Hg(II) detection
  • Modified electrode

ASJC Scopus subject areas

  • Electrochemistry

Cite this

Electrochemical Characteristic of Biotinyl Somatostatin-14/Nafion Modified Gold Electrode in Development of Sensor for Determination of Hg(II). / Nurulhaidah, Daud; Yusof, Nor Azah; Nor, Siti Mariam Mohd.

In: International Journal of Electrochemical Science, Vol. 8, No. 7, 2013, p. 10086-10099.

Research output: Contribution to journalArticle

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