Simultaneous Determination of Epinephrine and Tyrosine Using a Glassy Carbon Electrode Amplified with ZnO-Pt/CNTs Nanocomposite

Author(s): Ali Samadzadeh, Iran Sheikhshoaie*, Hassan Karimi-Maleh*.

Journal Name: Current Analytical Chemistry

Volume 15 , Issue 2 , 2019

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Background: Simultaneous analysis of epinephrine and tyrosine as two effective and important biological compounds in human blood and urine samples are very important for the investigation of human health.

Objective: In this research, a highly effective voltammetric sensor fabricated for simultaneous analysis of epinephrine and tyrosine. The sensor was fabricated by the modification of glassy carbon electrode with ZnO-Pt/CNTs nanocomposite (ZnO-Pt/CNTs/GCE). The synthesized nanocomposite was characterized by SEM method. The ZnO-Pt/CNTs/GCE showed two separated oxidation signals at potential ~220 mV and 700 mV for epinephrine and tyrosine, respectively. Also, we detected linear dynamic ranges 0.5-250.0 µM and 1.0-220 µM with a limit of detections 0.1 µM and 0.5 µM for the determination of epinephrine and tyrosine, respectively. The ZnO-Pt/CNTs/GCE was used for the determination of epinephrine and tyrosine in blood serum and human urine samples.

Keywords: Epinephrine, tyrosine, ZnO-Pt/CNTs nanocomposite, electrochemical sensors, carbon electrode, biological compounds.

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Article Details

Year: 2019
Page: [166 - 171]
Pages: 6
DOI: 10.2174/1573411014666180313115001
Price: $58

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