Flavonoids In The Stem Of Purple Coneflower (Echinacea Purpurea) And Their Significance

This study was aimed at determining the chemical and quantitative composition of flavonoids in the stem of purple coneflower (Echinacea purpurea L.) using High-Performance Liquid Chromatography (HPLC; LC-40 Nexera Lite, Shimadzu). Quercetin, rutin, gallic acid, apigenin, kaempferol, and salicylic acid standards were used for analysis, while extraction was carried out in a 96% ethanol medium using an ultrasonic bath. The results showed that salicylic acid (464.528 mg/100 g) and kaempferol (54.033 mg/100 g) were present in the highest amounts in the plant material. These polyphenols are the main metabolites responsible for the antioxidant and anti-inflammatory activity of the plant, confirming their high pharmacological and technological significance.