Amperometric determination of L-cysteine using a glassy carbon electrode modified with palladium nanoparticles grown on reduced graphene oxide in a Nafion matrix
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 diame...
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Springer Vienna
2018
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my.umk.eprints.73852022-05-23T09:58:42Z http://discol.umk.edu.my/id/eprint/7385/ Amperometric determination of L-cysteine using a glassy carbon electrode modified with palladium nanoparticles grown on reduced graphene oxide in a Nafion matrix Norazriena Yusoff Perumal Rameshkumar An’amt Mohamed Noor Nay Ming Huang 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. Springer Vienna 2018 Indexed Article PeerReviewed Norazriena Yusoff and Perumal Rameshkumar and An’amt Mohamed Noor and Nay Ming Huang (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. pp. 185-246. ISSN 0026-3672 (Print) 1436-5073 (Online) https://link.springer.com/article/10.1007/s00604-018-2782-x https://doi.org/10.1007/s00604-018-2782-x https://doi.org/10.1007/s00604-018-2782-x |
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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. |
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Indexed Article |
author |
Norazriena Yusoff Perumal Rameshkumar An’amt Mohamed Noor Nay Ming Huang |
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Norazriena Yusoff Perumal Rameshkumar An’amt Mohamed Noor Nay Ming Huang Amperometric determination of L-cysteine using a glassy carbon electrode modified with palladium nanoparticles grown on reduced graphene oxide in a Nafion matrix |
author_facet |
Norazriena Yusoff Perumal Rameshkumar An’amt Mohamed Noor Nay Ming Huang |
author_sort |
Norazriena Yusoff |
title |
Amperometric determination of L-cysteine using a glassy carbon electrode modified with palladium nanoparticles grown on reduced graphene oxide in a Nafion matrix |
title_short |
Amperometric determination of L-cysteine using a glassy carbon electrode modified with palladium nanoparticles grown on reduced graphene oxide in a Nafion matrix |
title_full |
Amperometric determination of L-cysteine using a glassy carbon electrode modified with palladium nanoparticles grown on reduced graphene oxide in a Nafion matrix |
title_fullStr |
Amperometric determination of L-cysteine using a glassy carbon electrode modified with palladium nanoparticles grown on reduced graphene oxide in a Nafion matrix |
title_full_unstemmed |
Amperometric determination of L-cysteine using a glassy carbon electrode modified with palladium nanoparticles grown on reduced graphene oxide in a Nafion matrix |
title_sort |
amperometric determination of l-cysteine using a glassy carbon electrode modified with palladium nanoparticles grown on reduced graphene oxide in a nafion matrix |
publisher |
Springer Vienna |
publishDate |
2018 |
url |
https://doi.org/10.1007/s00604-018-2782-x http://discol.umk.edu.my/id/eprint/7385/ https://link.springer.com/article/10.1007/s00604-018-2782-x https://doi.org/10.1007/s00604-018-2782-x |
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13.160551 |