A green method for determination of total acid number in oils by 4-hydroxystyryl dyes as indicators.

Автор(и)

  • Yu. P. Zhukova Uzhhorod National University, Faculty of Chemistry, Department of Analytical Chemistry, Uzhhorod
  • Ya. I. Studenyak Uzhhorod National University, Faculty of Chemistry, Department of Analytical Chemistry, Uzhhorod
  • R. T. Mariychuk University of Prešov, Faculty of Humanities and Natural Sciences, Department of Ecology, Prešov

Анотація

The quality of the various types of oils, biodiesel and similar products depends on production technology, raw materials, storage time and conditions, and so on. Evaluation of quality of oils realized by determination several parameters, for instance, acid number which is defined as the quantity mg KOH, necessary for neutralization of fatty acids in one gram of sample. Our research deals with the investigation of new 4-hydroxystyryl merocyanine dyes as indicators for the determination of the total acid number (TAN) by titrimetric visual or instrumental methods. The 4-hydroxystyryl dyes, the derivatives of N-heterocyclic methylene bases (2-, 4-quinoline or pyridine, indolenine, benzothiazole, etc.), not very often used in chemical analysis. However, our investigation of its analytical, protolytical, colorimetrical and other properties demonstrates the good prospects for application the dyes for determination of molecular acidity or as microenvironment sensors.

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Опубліковано

2017-04-05

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Аналітична хімія