title: Differentiation of species of the Baccharis genus by HPLC and chemometric methods.
abstract: Phytochemical investigation of the aerial parts of three Baccharis species (Asteraceae family) was performed using HPLC and chemometric methods, with the objective of distinguishing between three morphologically very similar species: Baccharis genistelloides Persoon var. trimera (Less.) DC, B. milleflora (Less.) DC and B. articulata (Lam.) Persoon. With the help of Principal Component Analysis (PCA) and variance weights, it was possible to characterize the chromatographic profiles of the alcoholic extracts of the three species. Application of Soft Independent Modeling of Class Analogy (SIMCA) and K-Nearest Neighbor (KNN) methods on a training set of 74 extracts resulted in models that correctly classified all eight samples in an independent test set.
authors.affiliation: Departamento de Química, Universidade Estadual de Londrina, Caixa Postal 6001, CEP 86051-970, Londrina, Paraná, Brazil.
authors.forename: Audrey A S G
authors.initials: AA
authors.lastname: Lonni
authors.forename: Ieda S
authors.initials: IS
authors.lastname: Scarminio
authors.forename: Lucas M C
authors.initials: LM
authors.lastname: Silva
authors.forename: Dalva T
authors.initials: DT
authors.lastname: Ferreira
mesh_terms: D031175:Baccharis / Q000737:chemistry* / Q000145:classification*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D035261:Plant Components, Aerial / Q000737:chemistry; D025341:Principal Component Analysis / Q000379:methods*; D013045:Species Specificity