Abstract
Abstract Echinacea purpurea is one of the most widely used immunostimulant plants. Its main active compounds are polysaccharides, glycoproteins, caffeic acid derivatives, alkamides, and melanins. The article describes an optimized extraction procedure that enables spectrophotometric quantification of polysaccharides from Echinacea purpurea. The extraction procedure can be widely applied as it demonstrated to be useful for determining polysaccharide content in flowers and leaves, in summer and autumn plants, in plants with green and red stem, and in plants from two different plantations. A significantly higher content of polysaccharides in flowers in comparison to leaves, as well as in plants with green stems in comparison to plants with red stems was determined. Statistical differences were absent in plants collected in different seasons and growing at different plantations.
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