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• W1804698935 abstract "A novel and selective enzymatic biosensor was designed and constructed for voltammetric determination of levodopa (l-Dopa) in aqueous media (phosphate buffer solution, pH = 7). Biosensor development was on the basis of to physically immobilizing of horse radish peroxidase (HRP) as electrochemical catalyst by sol–gel on glassy carbon electrode modified with organic nucleophilic carbon nanotube composite which in this composite p-phenylenediamine (pPDA) as organic nucleophile chemically bonded with functionalized MWCNT (MWCNT-COOH). The results of this study suggest that prepared bioorganic nucleophilic carbon nanotube composite (HRP/MWCNT-pPDA) shows fast electron transfer rate for electro oxidation of l-Dopa because of its high electrochemical catalytic activity toward the oxidation of l-Dopa, more NH2 reactive sites and large effective surface area. Also in this work we measured l-Dopa in the presence of folic acid and uric acid as interferences. The proposed biosensor was characterized by scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), FT-IR spectroscopy and cyclic voltammetry (CV). The differential pulse voltammetry (DPV) was used for determination of l-Dopa from 0.1 μM to 1.9 μM with a low detection limit of 40 nM (for S/N = 3) and sensitivity was about 35.5 μA/μM. Also this biosensor has several advantages such as rapid response, high stability and reproducibility." @default.
• W1804698935 created "2016-06-24" @default.
• W1804698935 creator A5040311861 @default.
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• W1804698935 date "2016-01-01" @default.
• W1804698935 modified "2023-10-17" @default.
• W1804698935 title "Glassy carbon electrode modified with horse radish peroxidase/organic nucleophilic-functionalized carbon nanotube composite for enhanced electrocatalytic oxidation and efficient voltammetric sensing of levodopa" @default.
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• W1804698935 doi "https://doi.org/10.1016/j.msec.2015.09.028" @default.
• W1804698935 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/26478378" @default.
• W1804698935 hasPublicationYear "2016" @default.
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