Methyl Orange Electropolymerized Composite Carbon Paste Electrode as a Sensitive and Selective Sensor for the Electrochemical Determination of Riboflavin
- Authors: Amrutha B. Monnappa1, J. G. Manjunatha2, Aarti S. Bhatt3, Akshatha Nemumoolya4, Sharmila B. Medappa5, Geethanjali N. Karthammaiah6
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View Affiliations Hide Affiliations1 Department of Chemistry, FMKMC College, Madikeri, Constituent College of Mangalore University, Karnataka, India ⋅ Department of Chemistry, N.M.A.M. Institute of Technology, Visvesvaraya Technological University, Belgavi, Nitte, 574110, Udupi District, Karnataka, India 2 Department of Chemistry, FMKMC College, Madikeri, Constituent College of Mangalore University, Karnataka, India 3 Department of Chemistry, N.M.A.M. Institute of Technology, Visvesvaraya Technological University, Belgavi, Nitte, 574110, Udupi District, Karnataka, India 4 Department of Chemistry, FMKMC College, Madikeri, Constituent College of Mangalore University, Karnataka, India 5 Department of Chemistry, FMKMC College, Madikeri, Constituent College of Mangalore University, Karnataka, India 6 Department of Chemistry, FMKMC College, Madikeri, Constituent College of Mangalore University, Karnataka, India
- Source: Voltammetry for Sensing Applications , pp 117-133
- Publication Date: February 2022
- Language: English
Methyl Orange Electropolymerized Composite Carbon Paste Electrode as a Sensitive and Selective Sensor for the Electrochemical Determination of Riboflavin, Page 1 of 1
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<b></b>Riboflavin (RB) is a vital B group water soluble vitamin. RB is essential forall animals and humans. This essential constituent of flavoenzyme, which plays animportant role in biochemical reactions, is investigated by Cyclic voltammetry (CV)and Differential pulse voltammetry (DPV) using Poly methyl orange modifiedcomposite carbon paste electrode (PMOMCCPE). RB exhibits an oxidation peak withthe highest anodic current of 54.82 µA at a potential of − 0.4360 V in 0.2 M phosphatebuffer solution (PBS) with a pH value of 7.5. The surface topography studies offabricated PMOMCCPE were carried out by CV, Field emission scanning electronmicroscopy (FE-SEM) and Electronic impedance spectroscopy (EIS). Optimization ofpH and polymer cycle was carried out, and the effect of scan rate was also studied. Theanodic peak current obtained is linearly related to the variations in the concentration ofRB in the range 4 to 50 µM. Other features include a detection limit of 1.67 ×10-7 M,and good reproducibility, repeatability and stability. Simultaneous determination of RBwith dopamine (DA) was done and interferences by some potentially interferingcompounds were tested. PMOMCCPE was successfully used for determining RB inpharmaceutical formulations which gave recoveries in the range from 96.50 to 99.53%.
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