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Voltammetric determination of vitamin B6 in food samples and dietary supplements
Institution:1. Department of Nanochemistry, Nano Technology Research Center, Urmia University, Urmia 57154, Iran;2. Department of Nano Technology, Faculty of Science, Urmia University, Urmia 57154, Iran;3. Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz 51664, Iran;4. Pharmaceutical Analysis Research Center and Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz 51664, Iran;5. Department of Chemistry, Faculty of Science, Urmia University, Urmia 57154, Iran;1. Department of Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, Iran;2. Gas Division, Research Institute of Petroleum Industry, P.O. Box 14665-137, Tehran, Iran;3. Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, India;4. Department of Applied Chemistry, University of Johannesburg, Johannesburg, South Africa;5. Department of Wood and Paper Science and Technology, Sari Branch, Islamic Azad University, Sari, Iran;6. Center of Excellence in Electrochemistry, Faculty of Chemistry, University of Tehran, Tehran, Iran;7. Center Laboratory of Electrochemistry, Kerman, Iran
Abstract:A simple and rapid voltammetric method based on the use of disposable screen-printed electrodes is proposed for the determination of vitamin B6. The influence of the pH on the voltammetric response was analyzed. Estimation of the linear range (2.0 × 10?6/7.2 × 10?5 M), calibration function, limit of detection (1.5 × 10?6 M) and reproducibility was performed along with the determination of possible interferences from species present in real samples. The proposed analytical system was successfully applied for the determination of pyridoxine in multivitamin supplements, energy drinks and breakfast cereals by using the standard addition method.
Keywords:Pyridoxine  Vitamins  Screen-printed electrodes  Carbon nanotubes  Voltammetry  Food analysis  Supplements  Energy drinks  Food composition  Analytical methods  Rapid food analytical methods
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