Yusoff, Norazriena and Rameshkumar, Perumal and Mohamed Noor, An’amt and Huang, Nay Ming (2018) Amperometric determination of L-cysteine using a glassy carbon electrode modified with palladium nanoparticles grown on reduced graphene oxide in a Nafion matrix. Microchimica Acta, 185 (4). ISSN 0026-3672, DOI https://doi.org/10.1007/s00604-018-2782-x.
Full text not available from this repository.Abstract
An amperometric sensor for L-Cys is described which consists of a glassy carbon electrode (GCE) that was modified with reduced graphene oxide placed in a Nafion film and decorated with palladium nanoparticles (PdNPs). The film was synthesized by a hydrothermal method. The PdNPs have an average diameter of about 10 nm and a spherical shape. The modified GCE gives a linear electro-oxidative response to L-Cys (typically at +0.6 V vs. SCE) within the 0.5 to 10 μM concentration range. Other figures of merit include a response time of less than 2 s, a 0.15 μM lower detection limit (at signal to noise ratio of 3), and an analytical sensitivity of 1.30 μA·μM−1·cm−2. The sensor displays selectivity over ascorbic acid, uric acid, dopamine, hydrogen peroxide, urea, and glucose. The modified GCE was applied to the determination of L-Cys in human urine samples and gave excellent recoveries.
| Item Type: | Article |
|---|---|
| Funders: | Postgraduate Research Fund (PG122-2014b) from the University of Malaya, Fundamental Research Grant Scheme (R/FRGS/A08.00/00648A/001/2016/000368) from Ministry of Higher Education |
| Uncontrolled Keywords: | Cyclic voltammetry; Electrochemical sensor; Graphene materials; Hydrothermal synthesis; Metal nanoparticles; Nanocomposites; Urine sample |
| Subjects: | Q Science > Q Science (General) Q Science > QC Physics Q Science > QD Chemistry |
| Divisions: | Faculty of Science |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 30 Jan 2019 03:15 |
| Last Modified: | 30 Jan 2019 03:15 |
| URI: | http://eprints.um.edu.my/id/eprint/20228 |
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