A surface network based on polytyramine gold nanoparticles : characterization, kinetics, thermodynamics and selective determination of norepinephrine
Other Title(s)
بناء سطح شبكي من بوليمر التيرامين و ذرات النانو لعنصر الذهب : دراسة تشخيص البناء، الديناميكيا الحركية و الحرارية ، الانتاايية يي تحيي النورابنررين
Joint Authors
al-Maskari, Arwa
Khudaish, Imad A.
Source
Sultan Qaboos University Journal for Science
Issue
Vol. 26, Issue 1 (30 Jun. 2021), pp.8-21, 14 p.
Publisher
Sultan Qaboos University College of Science
Publication Date
2021-06-30
Country of Publication
Oman
No. of Pages
14
Main Subjects
Abstract EN
A solid-state sensor was fabricated by a spontaneous electrochemical deposition of polytyramine (Ptyr) film onto a glassy carbon electrode (GCE) which was further peripherally supported by gold nanoparticles (AuNPs).
The surface materials of the developed sensor (AuNPs.Ptyr-GCE) were characterized by X-ray photoelectron spectroscopy (XPS), electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV) and differential pulse voltammetry (DPV).
The rate constant of charge transfers (kct) of the as-prepared sensor (8.77 × 10-4 cm/s) was evaluated by fitting the charge transfer resistance (Rct) data in the presence of ferric-ferrous hexacyanide redox couple solution, [Fe(CN)6]3-/4-.
The voltammetric behavior of norepinephrine (NOR) was confirmed to follow an irreversible reaction mechanism at which the estimated diffusion coefficient value was 7.39 × 10-5 cm2/s.
The sensor showed a large enhancement on NOR oxidation and comparatively lowered its detection limit (DL3) to 0.130 M (22 ppb).
It was also applied for selective determination of NOR in the presence of high concentrations of ascorbic acid (AA) and uric acid (UA).
The interference study highlighted the great stability of the proposed sensor by generating a similar sensitivity as in the pure NOR solution.
The analytical performance of the proposed system was validated successfully for pharmaceutical and biological samples with tolerable recovery percentages.-
American Psychological Association (APA)
Khudaish, Imad A.& al-Maskari, Arwa. 2021. A surface network based on polytyramine gold nanoparticles : characterization, kinetics, thermodynamics and selective determination of norepinephrine. Sultan Qaboos University Journal for Science،Vol. 26, no. 1, pp.8-21.
https://search.emarefa.net/detail/BIM-1341552
Modern Language Association (MLA)
Khudaish, Imad A.& al-Maskari, Arwa. A surface network based on polytyramine gold nanoparticles : characterization, kinetics, thermodynamics and selective determination of norepinephrine. Sultan Qaboos University Journal for Science Vol. 26, no. 1 (2021), pp.8-21.
https://search.emarefa.net/detail/BIM-1341552
American Medical Association (AMA)
Khudaish, Imad A.& al-Maskari, Arwa. A surface network based on polytyramine gold nanoparticles : characterization, kinetics, thermodynamics and selective determination of norepinephrine. Sultan Qaboos University Journal for Science. 2021. Vol. 26, no. 1, pp.8-21.
https://search.emarefa.net/detail/BIM-1341552
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 19-21
Record ID
BIM-1341552