Direct determination of oxalic acid by a bare platinum electrode contrasting a platinum nanoparticles-modified glassy carbon electrode. Issue 16 (1st November 2016)

• Record Type: Journal Article
• Authors: Ma, Le; Zeng, Qiang; Zhang, Min; Wang, Lishi; Cheng, Faliang
• Is Part Of: Journal of experimental nanoscience. Volume 11:Issue 16(2016)
• Page Start: 1242
• Page End: 1252
• Publication Date: 2016-11-01
• Subjects: oxalic acid sensor -- electrochemical determination -- constant potential amperometry -- platinum nanoparticles -- modified electrode; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanomedicine -- Periodicals; Nanotechnology -- Periodicals; 620.5
• DOI: 10.1080/17458080.2016.1209586
• Languages: English
• ISSNs: 1745-8080

Abstract

ABSTRACT: A bare platinum disk electrode without further decoration was directly used to determine oxalic acid (OA), showing good linear ranges of 0.57–104.01 μM and 104.01–228.75 μM with a low detection limit of 0.38 μM (S/N = 3). In contrast, platinum nanoparticles (PtNPs) dispersed on a glassy carbon electrode were successfully achieved by an one-step electrochemical deposition method, possessing relatively wider linear detection ranges of 1.14–342.80 μM and 342.80–548.92 μM for OA with a lower detection limit of 0.28 μM (S/N = 3). Both the proposed electrochemical sensors exhibit great reproducibility, stability and selectivity. In particular, they have been applied to the determination of OA in real spinach samples, showing excellent analytical performance.