J Pharm Biomed Anal. 2001 Aug; 26(1): 79-87.

Variation of free phenolic acids in medicinal plants belonging to the Lamiaceae family.

ZgÃ³rka G, GÅowniak K.

Department of Pharmacognosy, Medical University, 12 PeowiakÃ³w St., 20-007 Lublin, Poland. [email protected]

Ten species belonging to the family Lamiaceae and representing the most popular medicinal plants used in Polish phytotherapy were examined for the content of free phenolic acids (PhAs). Two depsides, rosmarinic and chlorogenic acids, as well as eight simple PhAs, protocatechuic, gentisic, p-hydroxybenzoic, caffeic, vanillic, syringic, p-coumaric and ferulic acids, in different qualitative and quantitative proportions depending on the plant examined were determined by the rapid, selective and accurate method combining solid-phase extraction and high-performance liquid chromatography.