|Title:||A simple and rapid electrochemical determination of L-tryptophan based on functionalized carbon black/poly-L-histidine nanocomposite||Authors:||Mutharani, Bhuvanenthiran
Chen, Shen Ming
Chen, Tse Wei
Ali, M. Ajmal
Al-Hemaid, Fahad M.A.
Elshikh, Mohamed Soliman
|Issue Date:||1-Jan-2018||Journal Volume:||165||Journal Issue:||10||Source:||Journal of the Electrochemical Society||Abstract:||
© 2018 The Electrochemical Society. In the present work, the functionalized carbon black/poly-l-histidine modified glassy carbon electrode (f-CB/PLH/GCE) was fabricated and applied for the amperometric determination of Try. The proposed modified electrode was prepared by non-hazardous, inexpensive, simple electro polymerization method. The successful formation of f-CB/PLH composite was scrutinized by field-emission scanning electron microscopy, transmission electron microscopy, optical microscope, energy dispersive X-ray spectroscopy, Fourier transform infra-red spectroscopy, Raman spectroscopy and electrochemical impendence spectroscopy. Besides, the electrocatalytic activity of the f-CB/PLH composite was examined by cyclic voltammetry and amperometric techniques. Remarkably, the wide linear range responses from 0.025-124.98 μM with the lowest detection limit 0.008 μM and an appreciable sensitivity of 1.126 μA mM-1 cm-2 was obtained. In addition, f-CB/PLH/GCE exhibits the good selectivity in presence of various inorganic, biological and co-existing interfering compounds. Furthermore, the practical feasibility of the sensor electrode was demonstrated in milk and human urine samples.
|Appears in Collections:||政治學系|
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