Electrochemical determination of picric acid based on platinum nanoparticles–reduced graphene oxide composite. Issue 15 (7th December 2016)

• Record Type: Journal Article
• Authors: Mahyari, Mojtaba
• Is Part Of: International journal of environmental analytical chemistry. Volume 96:Issue 15(2016)
• Page Start: 1455
• Page End: 1468
• Publication Date: 2016-12-07
• Subjects: Electrochemical sensor -- explosive sensor -- picric acid -- platinum nanoparticles -- reduced graphene oxide; Ecology -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental chemistry -- Periodicals; Pollution -- Periodicals; 577.14
• DOI: 10.1080/03067319.2016.1268606
• Languages: English
• ISSNs: 0306-7319

Abstract

ABSTRACT: Platinum nanoparticles–reduced graphene oxide composite-modified glassy carbon electrode (PtNPs–rGO/GCE) was developed as a simple, selective and sensitive electrochemical sensor for determination of picric acid (PA). Cyclic voltammogram (CV) of PA showed three well-defined irreversible reduction peaks at the potentials of −0.43, −0.57 and −0.66 V versus Ag/AgCl. In this work, the interference effect of other nitrophenol compounds (NPhCs) was significantly reduced by appropriate adjusting of pH. Square wave voltammetry was used for quantification of PA in the range of 5–500 µM (1.15–115 mg L −1 ) with practical detection limit of 1 µM (0.23 mg L −1 ). The proposed sensor was successfully applied for the determination of PA in two natural water samples.