Journal
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
Volume 45, Issue -, Pages 210-215Publisher
ELSEVIER
DOI: 10.1016/j.msec.2014.09.013
Keywords
NADH; CdO nanopartides; Ionic liquid; Electrochemical impedance spectroscopy; Voltammetry
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Funding
- Graduate University of Advanced Technology, Kerman
- Sari Branch, Islamic Azad University, Sari
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In this paper we report the synthesis and application of CdO nanopardcle (CdO/NPs) and 1,3-dipropylimidazolium bromide as high sensitive sensors for voltammetric determination of nicotinamide adenine dinucleotide (NADH) using carbon paste electrode. The cyclic voltammogram showed an irreversible oxidation peak at 0.68 V (vs. Ag/AgClsat), which corresponded to the oxidation of NADH. Compared to common carbon paste electrode, the electrochemical response was greatly improved for NADH electrooxidation at a surface of CdO/NP modified ionic liquid carbon paste electrode (IL/CdO/NP/CPE). The linear response range and detection limit were found to be 0.09-750 mu mol L-1 and 0.05 mu mol L-1, respectively. Result shows that other physiological species did not interfere in the determination of NADH at the surface of the proposed sensor in the optimum condition. The proposed sensor was successfully applied for the determination of NADH in tap water, urine and pharmaceutical serum samples. (C) 2014 Elsevier B.V. All rights reserved.
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