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Determination of Riboflavin at Carbon Nanotube Paste Electrodes Modified with an Anionic Surfactant
Author(s) -
Tigari Girish,
Manjunatha Jamballi G.,
Raril Chenthatill,
Hareesha Nagarajappa
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201803191
Subject(s) - electrode , saturated calomel electrode , detection limit , cyclic voltammetry , carbon nanotube , horizontal scan rate , pulmonary surfactant , analytical chemistry (journal) , electrochemistry , materials science , nanotube , buffer solution , chemistry , inorganic chemistry , nuclear chemistry , reference electrode , chromatography , nanotechnology , biochemistry
A Sodium lauryl sulfate modified carbon nanotube paste electrode (SLSMCNTPE) was fabricated for the electroanalysis of Riboflavin (RF) in phosphate buffer solution (PBS) at pH, 7.0 by cyclic voltammetry (CV). The electrode was found to be a very sensitive tool for detection of RF; it was shown that SLSMCNTPE yields a high current response towards RF as compared to the bare carbon nanotube paste electrode (BCNTPE). Key parameters were optimized for RF determination. The effects of surfactant concentration, pH, scan rate and concentration of RF on the oxidation peak current values were determined. The RF oxidation peak appeared at −440 mV and reduction peak at −575 mV vs. saturated calomel electrode (SCE). The SLSMCNTPE revealed good repeatability, reproducibility, stability, high electrochemical sensitivity in its voltammetric response and a detection limit of 9.25×10‐8 M.