Digital colorimetric determination of vitamin <em>C<em> using 18-molybdo-2-phosphate

Authors

  • Galyna O. Petrushyna Dnipropetrovsk State University of Agriculture and Economics, 25 Serhiy Yefremov St., Dnipropetrovsk, 49600, Ukraine https://orcid.org/0000-0001-5508-5193
  • Andriy B. Vishnikin Oles Honchar Dnipropetrovsk National University, 72 Gagarin Ave., Dnipropetrovsk, 49010, Ukraine https://orcid.org/0000-0003-0148-7845
  • Ludmyla I. Puhach Specialized secondary school № 9 in-depth study of English, 3 Mostova St., Dnipropetrovsk, 49000, Ukraine
  • Svitlana O. Khmelovs’ka Oles Honchar Dnipropetrovsk National University, 72 Gagarin Ave., Dnipropetrovsk, 49010, Ukraine
  • Darya V. Pidgorna Oles Honchar Dnipropetrovsk National University, 72 Gagarin Ave., Dnipropetrovsk, 49010, Ukraine

DOI:

https://doi.org/10.15421/081614

Keywords:

18-molybdo-2-phosphate, heteropoly blue, chromaticity, vitamin C, ascorbic acid

Abstract

Reduction with ascorbic acid of tetraethylammonium salt of 18-molybdo-2-phosphate heteropoly complex impregnated on the filter or the chromatographic paper was investigated. Digital scan images of colored paper test strips obtained with the office scanner were resolved into R, G, and B colors. It was found that dependence of the coordinates of RGB colors on the ascorbic acid concentration is satisfactorily linearized using the equation y = yo + Aexp(–c/t). Rapid and simple colorimetric method for the determination of ascorbic acid based on its reaction with impregnated on the paper 18-MPC was developed. Method was applied to the determination of vitamin C in juices.

Author Biographies

Galyna O. Petrushyna, Dnipropetrovsk State University of Agriculture and Economics, 25 Serhiy Yefremov St., Dnipropetrovsk, 49600

PhD

Andriy B. Vishnikin, Oles Honchar Dnipropetrovsk National University, 72 Gagarin Ave., Dnipropetrovsk, 49010

Head of the Department of Analytical Chemistry, Doctor of Chemical Sciences, Professor

Ludmyla I. Puhach, Specialized secondary school № 9 in-depth study of English, 3 Mostova St., Dnipropetrovsk, 49000

teacher

Svitlana O. Khmelovs’ka, Oles Honchar Dnipropetrovsk National University, 72 Gagarin Ave., Dnipropetrovsk, 49010

Associate Professor of the Department of Food Technology and Engineering, PhD, Honored teacher of the DNU, Education Excellent of the MESU

Darya V. Pidgorna, Oles Honchar Dnipropetrovsk National University, 72 Gagarin Ave., Dnipropetrovsk, 49010

student

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Published

2016-12-31

Issue

Vol. 24 No. 2 (2016): Bulletin of Dnipropetrovsk University. Series Chemistry

Section

Analytical Chemistry

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