| Journal: | Quimica nova |
| Database: | PERIÓDICA |
| System number: | 000313397 |
| ISSN: | 0100-4042 |
| Authors: | Gnoatto, Simone C.B1 Bassani, Valquiria L Coelho, Geraldo C2 Schenkel, Eloir P3 |
| Institutions: | 1Universidade Federal do Rio Grande do Sul, Faculdade de Farmacia, Porto Alegre, Rio Grande do Sul. Brasil 2Universidade de Ijui, Departamento de Biologia e Quimica, Ijui, Rio Grande do Sul. Brasil 3Universidade Federal de Santa Catarina, Departamento de Ciencias Farmaceuticas, Florianopolis, Santa Catarina. Brasil |
| Year: | 2007 |
| Season: | Abr |
| Volumen: | 30 |
| Number: | 2 |
| Pages: | 304-307 |
| Country: | Brasil |
| Language: | Portugués |
| Document type: | Artículo |
| Approach: | Experimental, aplicado |
| English abstract | Ilex paraguariensis A. St. -Hil. is a native species of southern South America. The caffeine content in Ilex paraguariensis leaves has been considered an important quality parameter for maté-derived products. In this work different extraction methods for the determination of these methylxantines are compared. The influence of the extraction conditions on the methylxanthine yields was evaluated. Extraction by decoction with acidic aqueous solution (H2SO4 4N) presented the higher efficiency in the theobromine extraction. The extraction in a Soxhlet with acidic aqueous solution and decoction with acidic aqueous solution showed the highest caffeine yield. For the concomitant theobromine and caffeine quantification, the decoction with acidic aqueous solution is suggested |
| Disciplines: | Química |
| Keyword: | Fitoquímica, Métodos de extracción, Metilxantinas, Ilex paraguariensis, Aquifoliaceae |
| Keyword: | Chemistry, Phytochemistry, Extraction methods, Methylxanthines, Ilex paraguariensis, Aquifoliaceae |
| Full text: | Texto completo (Ver HTML) |
