Simultaneous Electrochemical Determination of alpha-Tocopherol and Retinol in Micellar Media by a Poly(2,2 '-(1,4 Phenylenedivinylene)-bis-8-Hydroxyquinaldine)-Multiwalled Carbon Nanotube Modified Electrode


Filik H. , Avan A. A. , Aydar S.

ANALYTICAL LETTERS, cilt.49, ss.1240-1257, 2016 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 49 Konu: 8
  • Basım Tarihi: 2016
  • Doi Numarası: 10.1080/00032719.2015.1094665
  • Dergi Adı: ANALYTICAL LETTERS
  • Sayfa Sayıları: ss.1240-1257

Özet

A novel method was developed for the simultaneous electrochemical determination of alpha-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 alpha-tocopherol was linear from 8 to 100 mu M with a limit of detection of 0.1 mu M in the presence of 80 mu M retinol. The response was also linear with retinol concentration from 5 to 200 mu M with a detection limit of 0.8 mu M in the presence of 40 mu M alpha-tocopherol. The developed method was employed for the determination of the vitamins in pharmaceutical products.