Sensitive electrochemical determination of oxalic acid in spinach samples by a graphene-modified carbon ionic liquid electrode
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- 作者：Xiaofeng Wang ; Yong Cheng ; Zheng You ; Hailiang Sha ; Shixing Gong ; Jun Liu…
- 关键词：Oxalic acid ; Spinach ; Graphene ; Carbon ionic liquid electrode ; Electrochemistry
- 刊名：Ionics
- 出版年：2015
- 出版时间：March 2015
- 年：2015
- 卷：21
- 期：3
- 页码：877-884
- 全文大小：546 KB
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17. Pinizza M, Araújo EG, Santos EV, Silva DR, Fernandes NS, Martínez-Huitle CA (2013) Applicability of electroanalysis for monitoring oxalic acid (OA) concentration during its electrochemical oxidatio - 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Electrochemistry
Materials Science
Physical Chemistry
Condensed Matter
Renewable Energy Sources
Electrical Power Generation and Transmission - 出版者：Springer Berlin / Heidelberg
- ISSN：1862-0760
文摘
In this paper, a new electrochemical oxalic acid (OA) sensor based on graphene (GR)-modified carbon ionic liquid electrode (CILE) was proposed. The GR nanosheets were deposited on the surface of CILE by electroreduction with graphene oxide as precursor and electrocatalytic oxidation of OA on GR/CILE was further investigated. As compared with that of bare CILE, the oxidation peak current of OA on GR/CILE were greatly improved with the decrease of the oxidation potential. Electrochemical parameters of the electrooxidation of OA were calculated. Under the selected conditions, the oxidation peak currents increased with OA concentration in the range from 8.0?μM to 6.0?mM with the detection limit as 0.48?μM (3σ). The proposed method exhibited higher sensitivity and wider linear range, which was applied to determination of OA concentration in spinach samples with satisfactory results.