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Electrochemical characteristic of Biotinyl Somatostatin- 14/Nafion modified gold electrode in development of sensor for determination of Hg(II)


Citation

Daud, Nurulhaidah and Yusof, Nor Azah and Mohd Nor, Siti Mariam (2013) Electrochemical characteristic of Biotinyl Somatostatin- 14/Nafion modified gold electrode in development of sensor for determination of Hg(II). International Journal of Electrochemical Science, 8 (7). pp. 10086-10099. ISSN 1452-3981

Abstract / Synopsis

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.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Science
Institute of Advanced Technology
Publisher: Electrochemical Science Group
Keywords: Hg(ii) detection; Modified electrode; Electrochemical sensor
Depositing User: Umikalthom Abdullah
Date Deposited: 04 Jul 2014 08:27
Last Modified: 07 Oct 2015 15:27
URI: http://psasir.upm.edu.my/id/eprint/30161
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