Identificação de antocianinas em raízes de Eichhornia crassipes (Mart.) Solms

• Autor(a) principal: Cruz, Ana Tereza de Souza [UNESP]
• Data de Publicação: 2017
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/203844; http://www.athena.biblioteca.unesp.br/exlibris/bd/capelo/2019-05-20/000895131.pdf
• topic: Antocianinas; Eichhornia; Flavonoides; Cromatografia líquida de alta eficiência; Espectrometria de massa; Anthocyanins

Anthocyanins are natural products that belong to the group of flavonoids, showing color that can vary from red to blue, being used as natural dyes. These substances are known, as well, because of their antioxidant properties and that they are able to interact with metal species. Water hyacinth (Eichhornia crassipes (Mart.) Solms, Pontederiaceae) is a macrophyte used in the decontamination of aquatic environments, due to its ability to absorb metals and other pollutants. Preliminary phytochemical studies have reported the isolation and identification of anthocyanins esterified with malonic acid in the flowers of this plant. This work aimed the identification of anthocyanins and anthocyanidins in the roots of water hyacinth, so that in further studies it can be evaluated if the absorption of metals is related to a possible complexation of these with molecules of anthocyanins. The roots of the plant were extracted with methanol in acid medium. The fractions were analysed by High Performance Liquid Chromatography coupled to Diode Array Detector and Mass Spectrometry (HPLC-DAD-MS). After the analysis, it was possible to identify the presence of delphinidin-3-O-glycoside and 6-hydroxy-petunidin-3-O-glycoside, besides others...