Unmodified glassy carbon electrode as a reliable sensor for sensitive voltammetric quantification of vitamin D3

In this paper a sensitive voltammetric method was developed for determination of vitamin D3 in commercial dietetic supplements using unmodified glassy carbon electrode as a working electrode. Following the optimization of the square-wave voltammetric method, the linear relationship between the peak current and vitamin D3 concentration was perceived in the concentration range of 1.25-105 μmol/L. The calculated values of detection limit and quantification limit were 0.24 and 0.73 μmol/L, respectively. In addition, the developed analytical procedure revealed exceptional precision with RSD values for intra- and inter-day (n=7) lower than 3%. Finally, developed voltammetric method was successfully applied for the determination of vitamin D3 in dietetic supplements using standard addition method.

Abstract licence: CC BY-NC-ND

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