Voltammetric Method for the Simultaneous Determination of Melatonin and Pyridoxine in Dietary Supplements Using a Cathodically Pretreated Boron-doped Diamond Electrode


Alpar N., Talay Pınar P., Yardım Y., Şentürk Z.

ELECTROANALYSIS, vol.29, pp.1691-1699, 2017 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 29
  • Publication Date: 2017
  • Doi Number: 10.1002/elan.201700077
  • Journal Name: ELECTROANALYSIS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1691-1699
  • Keywords: Melatonin, Pyridoxine, Simultaneous determination, Boron-doped diamond electrode, Dietary supplements, CARBON-PASTE ELECTRODE, ADSORPTIVE STRIPPING VOLTAMMETRY, DIFFERENTIAL-PULSE VOLTAMMETRY, ELECTROCHEMICAL DETERMINATION, PHARMACEUTICAL-PREPARATIONS, FOOD SAMPLES, VITAMIN-C, TABLETS, NANOPARTICLES, NANOTUBES
  • Van Yüzüncü Yıl University Affiliated: Yes

Abstract

The simultaneous voltammetric determination of melatonin (MT) and pyridoxine (PY) has been carried out at a cathodically pretreated boron-doped diamond electrode. By using cyclic voltammetry, a separation of the oxidation peak potentials of both compounds present in mixture was about 0.47 V in Britton-Robinson buffer, pH 2. The results obtained by square-wave voltammetry allowed a method to be developed for determination of MT and PY simultaneously in the ranges 1-100 mu g mL(-1) (4.3x10(-6)-4.3x10(-4) mol L-1) and 10-175 mu g mL(-1) (4.9x10(-5)-8.5x10(-4) mol L-1), with detection limits of 0.14 mu g mL(-1) (6.0x10(-7) mol L-1) and 1.35 mu g mL(-1) (6.6x10(-6) mol L-1), respectively. The proposed method was successfully to the dietary supplements samples containing these compounds for health-caring purposes.