PHYTOCHEMICAL ANALYSIS OF SOME MEDICINAL PLANT PRODUCTS WITH ANTIOXIDANT POTENTIAL

Alexandra EPURE, Daniela BENEDEC, Rodica VARBAN, Daniela HANGANU, Cristina DRAGAN, Ilioara ONIGA

Abstract


The medicinal species Cynara scolymus, Cichorium intybus and Taraxacum officinale are known for their therapeutic properties, such as hepatoprotective, eupeptic, hypocholesterolemic, cholagogue, hypoglycemic, diuretic etc. The purpose of this comparative study was to determine the polyphenols content and the antioxidant potential of some natural products from these medicinal plants obtained from cultivated and spontaneous flora, but also purchased from commercial companies. The polyphenols contents (total polyphenols, flavonoids and caffeic acid derivatives) were spectrophotometrically determined. The samples from the spontaneous and cultivated flora revealed the highest polyphenolic contents: C. scolymus from culture (26.30 mg/g); spontaneous species C.intybus (26.01 mg/g) and T. officinale (32.56 mg/g). The antioxidant activity carried out with the DPPH· radical scavenging method and FRAP assay indicated that C. scolymus and T. officinale showed antiradical action in line with the polyphenol content. Medicinal plants products purchased from commercial companies had low concentrations of polyphenols, which led to low antioxidant activity or even no antioxidant potential. The large quantitative chemical differences between the studied samples highlights the need for controlling the quality conditions for the vegetable raw material, regarding the harvesting, drying, sorting, purification, preservation and storage.

Keywords


antioxidant potential, Cichorium intybus, Cynara scolymus, Taraxacum officinale, polyphenolic compounds

Full Text:

PDF