Data/hora: 06/06/2024 01:32:48

Provedor de dados: | 52
País: | Brazil
Título: | Spectrophotometric determination of tannins and caffeine in preparations from Paullinia cupana var. sorbilis
Autores: | Pelozo,Maria Inez de Godoy; Cardoso,Mara Lane Carvalho; Mello,João Carlos Palazzo de.
Data: | 2008-06-01
Ano: | 2008
Palavras-chave: | Caffeine; Paullinia cupana; Total polyphenols; Spectrophotometric quantification assay.
Resumo: | The present work was designed to quantify the caffeine and total polyphenols in the extractive solution and the granulated form from the seeds of Paullinia cupana var. sorbilis, by the spectrophotometric method. The method showed linearity for the caffeine and polyphenols in the range of 5-25 µg/ml and 2.4-5.6 µg/ml respectively. The solutions of the semipurified fraction (EPA) and granulated form (GRA) showed linear responses in the range of 0.288-0.672 and 0.4-1.2 µg/ml, respectively. The precision and accuracy were determined for the EPA solution at a concentration of 100 µg/ml. The spectrophotometric method performed well in quantifying the caffeine and total polyphenols.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000300002
Editor: | Instituto de Tecnologia do Paraná - Tecpar
Relação: | 10.1590/S1516-89132008000300002
Formato: | text/html
Fonte: | Brazilian Archives of Biology and Technology  v.51 n.3 2008
Fonte: | info:eu-repo/semantics/openAccess