Highly dispersed multiwalled carbon nanotubes coupled manganese salen nanostructure for simultaneous electrochemical sensing of vitamin B2 and B6

Abstract

A nanocomposite of Mn(salen)Cl (where salen is N,N′-bis(salicylidene)ethylenediamine) and multiwalled carbon nanotubes (MWCNTs) is prepared. The advantageous properties of MWCNTs and catalytic properties of Mn(salen)Cl (represented as MnIIIsalen) are combined in this new nanocomposite (represented as MWCNTs-MnIIIsalen). Several techniques including electrochemical ones are used for the characterization of the MWCNTs-MnIIIsalen nanostructure. After complete characterization it is utilized for simultaneous determination of vitamin B2 (riboflavin) and B6 (pyridoxine) using differential pulse voltammetry (DPV). MWCNTs-MnIIIsalen coated on glassy carbon electrode (GC), represented as GC/MWCNTs-MnIIIsalen exhibits high sensitivity and low detection limit. This electrode demonstrates high reproducibility (R.S.D. = 3.7% and 3.4% for vitamin B2 and B6, respectively) and long storage stability (more than 10 days under normal room temperature condition). Methodologies for the analysis of vitamins B2 and B6 using GC/MWCNTs-MnIIIsalen in pharmaceutical formulations using simple electrochemical techniques are elucidated. © 2017