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Binary Mixture of Lanthanide Metal Doped ZnO Nanorod: f-MWCNT Nanocomposite for Simultaneous and Selective Determination of Vitamins B2 and B6

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An electrochemical sensor using lanthanide element Gadolinium doped Zinc oxide and functionalized Multiwalled Carbon Nanotube (Gd-ZnO:f-MWCNT) fabricated electrode was presented for the simultaneous determination of vitamins (Riboflavin (VB2) and Pyridoxine (VB6)). The nanocomposite was characterized by FESEM, EDS, XRD and FTIR techniques. The CV, EIS and DPV techniques were used to evaluate the electrochemical properties of the nanocomposite. Under optimum conditions, the peak current of VB2 and VB6 are linearly proportional to its concentration in the range from 0.05 to 10 μM and the estimated detection limits were 0.009 and 0.001 μM for VB2 and VB6 respectively. The sensitivities calculated were 0.94 μA nM−1 cm−2 (VB2) and 1.43 μA nM−1 cm−2 (VB6). In addition, the proposed electrode was exhibited high selectivity, reproducibility, as well as long-term stability for the determination of vitamins. Finally, the vitamins contained in pharmaceutical formulation and commercial orange juice has been determined by the proposed sensor and the obtained results were validated with HPLC.
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Keywords: Electrochemical Sensing; Functionalized Multiwalled Carbon Nanotube; Gd Doped ZnO; Pyridoxine; Riboflavin

Document Type: Research Article

Affiliations: 1: Environmental Research Lab, PG and Research Department of Chemistry, Alagappa Government Arts College, Karaikudi 630003, Tamil Nadu, India 2: Department of Applied Science and Technology, AC Tech, Anna University, Chennai 600025, India

Publication date: April 1, 2020

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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