Chromatographical analysis of phenolic acids in some species of Polygonum L. genus. Quantitative determination of the major components by high performance liquid chromatography (HPLC)

Abstract

Nine major phenolic acids (protocatechuic, gentisic, p-hydroxybenzoic, vanillic, caffeic, syringic, p-coumaric, ferulic, synapic) were investigated in 9 species of the genus <em>Polygonum</em> L. The total amount of these compounds equated 65.8 µg/g of dry herb in <em>Polygonum persicaria</em> L., 61.2 µg in <em>P. convolvulus</em> L., 59.1 µg in <em>P. lapathifolium</em> ssp. <em>nodosum</em> (Pers.) Dans, 53.3 µg in <em>P. bistorta</em> L., 42.1 µg in <em>P. mite</em> Schrank, 38.2 µg in <em>P. lapathifolium</em> ssp. <em>tomentosum</em> (Schrank) Dans, 37 µg in <em>P. anrphibium</em> L., 33.2 µg in <em>P. hydropiper</em> L., 31.1 µg in <em>P. aviculare</em> L., and 14,1 µg in rhizome <em>P. bistorta</em> L. Among the analysed phenolic acids, synapic acid (28.6 µg/g) in <em>P. persicaria</em> L., protocatechuic acid (34 µg/g) in <em>P. lapathifolium</em> ssp. <em>nodosum</em> (Pers) Dans, and ferulic acid (21 µg/g) in <em>P. bistorta</em> L., were dominating.