ABSTRACT
A novel method was developed for the simultaneous electrochemical determination of α-tocopherol (viatmin E) and retinol (vitamin A) using a poly(2,2′-(1,4-phenylenedivinylene)-bis-8-hydroxyquinaldine)/multiwalled carbon nanotube modified glassy carbon electrode. The simple and rapid voltammetric approach was evaluated for real samples using Triton X-100 to solubilize the analytes in the absence of organic solvent. The calibration graph for α-tocopherol was linear from 8 to 100 µM with a limit of detection of 0.1 µM in the presence of 80 µM retinol. The response was also linear with retinol concentration from 5 to 200 µM with a detection limit of 0.8 µM in the presence of 40 µM α-tocopherol. The developed method was employed for the determination of the vitamins in pharmaceutical products.
Acknowledgment
The authors declare that they have no conflict of interest. This article does not report any human or animal studies.