A surfactant enhanced novel pencil graphite and carbon nanotube composite paste material as an effective electrochemical sensor for determination of riboflavin

A novel sensor fabrication using anionic surfactant sodium lauryl sulphate modified carbonnanotube and pencil graphite composite paste electrode (SLSMCNTPGCPE) is prepared and characterized using Field Emission Scanning Electron Microscope (FE-SEM) and Cyclic Voltammetry (CV). The devised SLSMCNTPGCPE is a responsive electrode material for the determination of Riboflavin (RF) as compared to carbon nanotube and pencil graphite composite paste electrode (CNTPGCPE) and bare pencil graphite paste electrode (BPGPE). The fabricated sensor shows a linear current response to a diverse concentration of RF in 0.2-0.8 mM and 1-5 mM with a low detection limit of 1.16 x 10(-8) M by applying differential pulse voltammetry (DPV). The stability, reproducibility, repeatability, interference and concurrent investigation with dopamine (DA) have been done with satisfactory outcomes. The new sensor was applied for the RF estimation shows good recovery in B-complex pill and natural food supplement. (C) 2019 The Authors. Publishing services by Elsevier B.V. on behalf of Vietnam National University, Hanoi.