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Electrochemical detection of arsenite using a silica nanoparticles- modified screen-printed carbon electrode


Citation

Ismail, Suhainie and Yusof, Nor Azah and Abdullah, Jaafar and Abd Rahman, Siti Fatimah (2020) Electrochemical detection of arsenite using a silica nanoparticles- modified screen-printed carbon electrode. Materials, 13 (14). art. no. 3168. pp. 1-16. ISSN 1996-1944

Abstract

Arsenic poisoning in the environment can cause severe effects on human health, hence detection is crucial. An electrochemical-based portable assessment of arsenic contamination is the ability to identify arsenite (As(III)). To achieve this, a low-cost electroanalytical assay for the detection of As(III) utilizing a silica nanoparticles (SiNPs)-modified screen-printed carbon electrode (SPCE) was developed. The morphological and elemental analysis of functionalized SiNPs and a SiNPs/SPCE-modified sensor was studied using field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), and Fourier transform infrared spectroscopy (FTIR). The electrochemical responses towards arsenic detection were measured using the cyclic voltammetry (CV) and linear sweep anodic stripping voltammetry (LSASV) techniques. Under optimized conditions, the anodic peak current was proportional to the As(III) concentration over a wide linear range of 5 to 30 µg/L, with a detection limit of 6.2 µg/L. The suggested approach was effectively valid for the testing of As(III) found within the real water samples with good reproducibility and stability.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Science
Institute of Advanced Technology
DOI Number: https://doi.org/10.3390/ma13143168
Publisher: Multidisciplinary Digital Publishing Institute
Keywords: Arsenite; Electrochemical sensor; Screen-printed carbon electrode; Silica nanoparticles
Depositing User: Ms. Nuraida Ibrahim
Date Deposited: 06 Oct 2021 15:34
Last Modified: 06 Oct 2021 15:34
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.3390/ma13143168
URI: http://psasir.upm.edu.my/id/eprint/88770
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