Open AccessUnmodified glassy carbon electrode as a reliable sensor for sensitive voltammetric quantification of vitamin D3
Author(s) -
D Ana Djurovic,
Srdjan Z. Stojanović,
Z Snezana Kravic,
Tanja Brezo-Borjan,
Jovana Kos
Publication year - 2020
Publication title -
acta periodica technologica/acta periodica technologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.134
H-Index - 15
eISSN - 2406-095X
pISSN - 1450-7188
DOI - 10.2298/apt2051111d
Subject(s) - detection limit , electrode , vitamin , glassy carbon , linear range , square wave , chemistry , chromatography , analytical chemistry (journal) , voltammetry , linear relationship , electrochemistry , mathematics , biochemistry , cyclic voltammetry , statistics , physics , voltage , quantum mechanics
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 ?mol/L. The calculated values of detection limit and quantification limit were 0.24 and 0.73 ?mol/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.