2018-09-252018-09-252006-06BARA, Maria Teresa F.et al. Determinação do teor de princípios ativos em matérias-primas vegetais. Revista Brasileira de Farmacognosia, Curitiba, v. 16, n. 2, p. 211-215, abr./jun. 2006. 0102-695e- 1981-528Xhttp://repositorio.bc.ufg.br/handle/ri/16034Pharmaceutical preparations containing Aesculus hippocastanum L., Hypericum perforatum L., Paullinia cupana H.B.K. and Ginkgo biloba L. have large market. In this work the quality of the powder or extracts of these plants were evaluated. Pharmacopoeia methods or those cited on cientifi c literature for quantifi cation of active substances were employed and the data showed them to be adequate for these analyses. The analytical results demonstrated that 60% of the samples of P. cupana and G. biloba, and 100% and 20%, respectively of samples of H. perforatum and A. hippocastanum were not in agreement with the specifi cations. This analysis showed to be valuable for herbal medicines quality control.porAcesso AbertoControle de qualidadePaullinia cupanaPlanta medicinalAesculus hippocastanumFitoterápicoGinkgo bilobaHypericum perforatumQuality controlmedicinal plantsPaullinia cupanaPhytomedicineHypericum perforatumAesculus hippocastanumGinkgo bilobaArtigo10.1590/S0102-695X2006000200014