Nitrogen-doped graphene-ionic liquid-glassy carbon microsphere paste electrode for ultra-sensitive determination of quercetin

Ji, Ying and Li, Yuan and Ren, Binbin and Liu, Xinsheng and Li, Yonghong and Soar, Jeffrey ORCID: https://orcid.org/0000-0002-4964-7556 (2020) Nitrogen-doped graphene-ionic liquid-glassy carbon microsphere paste electrode for ultra-sensitive determination of quercetin. Microchemical Journal, 155:104689. pp. 1-7. ISSN 0026-265X

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Abstract

The analysis of quercetin (Qu) is of great significance owing to its multiple biomedical effects. In this work, a nitrogendoped graphene-ionic liquid-glassy carbon microsphere paste electrode (N-GE/GCILE) was constructed for the determination of Qu. Cyclic voltammetry (CV) and square wave voltammetry (SWV) were employed to investigate the electrochemical behavior of Qu. In comparison with unmodified glassy carbon microsphere paste electrode, the modified electrode exhibited better electrocatalytic activity towards Qu. The influencing conditions on sensitivity such as the amount of modifier, accumulation potential and time, and electrolyte pH value were respectively discussed.
Under the optimized conditions, two linear ranges of 0.002- 0.1 μM and 0.1-10 μM were obtained, with a detection limit of 1 nM (S/N=3). The method was applied in Qu determination in blueberry juice with the recoveries of 102.5-105.0 %.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: Historic - Faculty of Business, Education, Law and Arts - School of Management and Enterprise (1 Jul 2013 - 17 Jan 2021)
Faculty/School / Institute/Centre: Historic - Faculty of Business, Education, Law and Arts - School of Management and Enterprise (1 Jul 2013 - 17 Jan 2021)
Date Deposited: 16 Jun 2020 01:57
Last Modified: 26 Jul 2020 23:56
Uncontrolled Keywords: Nitrogen-doped graphene; Ionic liquid; Glassy carbon microsphere; Modified electrode; Quercetin
Fields of Research (2008): 03 Chemical Sciences > 0399 Other Chemical Sciences > 039999 Chemical Sciences not elsewhere classified
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970103 Expanding Knowledge in the Chemical Sciences
Identification Number or DOI: https://doi.org/10.1016/j.microc.2020.104689
URI: http://eprints.usq.edu.au/id/eprint/37877

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