Journal
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
Volume 814, Issue -, Pages 97-103Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2018.02.039
Keywords
Arsenic; Trithiocyanuric acid; Reduced graphene oxide; Electrochemical assay
Categories
Funding
- National Natural Science Foundation of China [21675078, 21475056]
- Key Project of Scientific and Technological Innovation Talents in Jiangxi Province [20165BCB18022]
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We propose an electrochemical assay for As(III) based on trithiocyanuric acid deposited reduced graphene oxide (TTCA/rGO) using square wave anodic stripping voltammetry (SWASV). In this work, TTCA/rGO is prepared by a simple one-pot method using NaBH4 as the reducing agent. Many TTCA molecules are successfully deposited on the surface of rGO through pi-pi conjugation, which endows the TTCA/rGO with excellent adsorption ability of As(III) via As-S bond. Combining the outstanding conductivity of rGO, the response of electrochemical current for As(M) determination is greatly amplified in the electrochemical detection process. Under optimum conditions, the TTCA/rGO modified gold electrode shows high sensitivity and good selectivity for the detection of As (III) with a low detection limit down to 0.054 ppb, which is promising to be applied for the rapid and sensitive determination of As(III) in complicated samples.
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