Abstract
The comprehensive approach that provides a theoretical and experimental justification of a new feedstock for the production of anthocyanins is proposed. Such approach is needed in order to solve the problem of obtaining natural dyes. As sunflower is the main oilseed crop in Ukraine, hundreds of thousands tons of husks are obtained every year as secondary products (wastes) in fat and oil industry while processing its seeds. The must promising raw material for extraction of natural dyes is the sunflower husk as a cheap and affordable base. The presence of polyphenolic compounds in sunflower seed husks samples was determined by qualitative reactions. Quantitative determination of anthocyanins in sunflower seed husks samples was performed by spectrophotometric method. For this purpose anthocyanins were extracted from the previously defatted and crushed husks with an aqueous solution of HCl (1 % m/m). The average content of anthocyanins in terms of cyanidin-3.5-diglucoside reached up to 0.42 %.
Highlights
Sunflower is the main oilseed crop in Ukraine
It is known that the husks of sunflower seed are used as raw materials in hydrolysis industry
The main part of sunflower seed husks are used as an alternative fuel, since it has a number of advantages over the traditional energy resources
Summary
Sunflower is the main oilseed crop in Ukraine. Due to processing of its seeds more than 2 million tons of husks are annually received as secondary products (wastes). It is known that the husks of sunflower seed are used as raw materials in hydrolysis industry. The second stage involves separation of solvent from the solution with a phytosorbent – crushed husk of sunflower seed, preliminarily subjected to acid hydrolysis [1]. An anthocyanin pigments (AC) include a wide group of water-soluble vegetable pigments that cause a red, blue and violet color of fruits, flowers, leaves and other parts of plants. Anthocyanidins (aglycones) are poorly soluble in water because of their structure, so they exist in an aqueoussoluble form as glycosidated derivatives in plants. Extracts of AC from plant raw material are used in the food industry as natural dyes for coloring a food pro ducts. A plant extracts, juices and concentrates that contain anthocyanins are of high importance in this spheres. The task of finding the new sources, from where the natural dyes can be extracted in the future (in a necessary quantities and a low price), has still been actual
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