title: Characterization of different samples of quercetin in solid-state: indication of polymorphism occurrence.
abstract: The present work was designed to compare four commercial samples of quercetin, three of them presenting pharmaceutical grade (QPGa, QPGb and QPGc) and the other one pro-analysi grade (QPA) by means of different techniques. Physical and chromatographic characterization of these samples shows different properties following its origin, especially a clear evidence of polymorphism occurrence.
authors.affiliation: Programa de Pós-Graduação em Ciências Farmacêuticas, Departamento de Controle e Produção de Medicamentos, Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Porto Allegre, Brasil.
authors.forename: G S
authors.initials: GS
authors.lastname: Borghetti
authors.forename: I M
authors.initials: IM
authors.lastname: Costa
authors.forename: P R
authors.initials: PR
authors.lastname: Petrovick
authors.forename: V P
authors.initials: VP
authors.lastname: Pereira
authors.forename: V L
authors.initials: VL
authors.lastname: Bassani
mesh_terms: D002853:Chromatography, Liquid; D018360:Crystallography, X-Ray; D007536:Isomerism; D008855:Microscopy, Electron, Scanning; D011794:Quercetin / Q000031:analogs & derivatives* / Q000032:analysis* / Q000737:chemistry; D012995:Solubility; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet
chemical_list: D011794:Quercetin