Sensitive voltammetric determination of neohesperidin dihydrochalcone based on SWNTs modified glassy carbon electrode

Abstract

A new voltammetric sensor, based on single-walled carbon nanotubes (SWNTs) modified glassy carbon electrode, was established and used for the determination of neohesperidin dihydrochalcone (NHDC). The electrochemical characterization of NHDC on this sensor was studied systematically by cyclic voltammetry, and the kinetics parameters were calculated for the first time. Compared with a bare GCE, the proposed sensor exhibited excellent redox activity towards NHDC, and a new voltammetric analytical method for NHDC was proposed with a wide linear range from 5 × 10⁻⁸ mol L⁻¹ to 8 × 10⁻⁶ mol L⁻¹ and a low detection limit of 2 × 10⁻⁸ mol L⁻¹. In addition, a reasonable mechanism was also proposed and discussed. Finally, the developed method was successfully applied for the quantitative determination of NHDC in beverages with high accuracy and satisfactory recovery results.