2009
DOI: 10.1590/s1984-82502009000100017
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Determinação quantitativa de taninos em três espécies de Stryphnodendron por cromatografia líquida de alta eficiência

Abstract: Um método de separação e quantificação por cromatografia líquida de alta eficiência (CLAE) em fase reversa foi desenvolvido usando água (0,05% de TFA):acetonitrila (0,05% de TFA) como fase móvel, em sistema gradiente para a análise dos flavan-3-óis presentes em extrato semipurificado das cascas de Stryphnodendron adstringens, Stryphnodendron polyphyllum e Stryphnodendron obovatum. A CLAE foi realizada com a fração acetato de etila (FAE) sendo submetida à extração em fase sólida (cartucho C18-E) com metanol:águ… Show more

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Cited by 22 publications
(14 citation statements)
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“…Generally, the most widely used method is a reverse-phase column C-18. Although gallic acid absorbs at various wavelengths between 201 and 280 nm, we chose 271 nm due to its higher absorption and better resolution of the peaks in these conditions (Arapitsas, 2012;De Souza et al, 2002;Lopes et al, 2009). Through the parameters of the calibration curve it was possible to determine with 95% confidence the limit of detection (LOD = 1.22 g/ml) and the limit of quantification (LOQ = 1.82 g/ml).…”
Section: Resultsmentioning
confidence: 99%
“…Generally, the most widely used method is a reverse-phase column C-18. Although gallic acid absorbs at various wavelengths between 201 and 280 nm, we chose 271 nm due to its higher absorption and better resolution of the peaks in these conditions (Arapitsas, 2012;De Souza et al, 2002;Lopes et al, 2009). Through the parameters of the calibration curve it was possible to determine with 95% confidence the limit of detection (LOD = 1.22 g/ml) and the limit of quantification (LOQ = 1.82 g/ml).…”
Section: Resultsmentioning
confidence: 99%
“…The utilization of the simple one-step liquid-liquid extraction method should completely extract the target constituents from the matrix. The extraction efficiency was evaluated by HPLC, and the results demonstrated the reliability of the process (Lopes et al, 2009a).…”
Section: Resultsmentioning
confidence: 96%
“…The precise profile of active constituents of S. rotundifolium is still not well known; however, tannins can be considered the most relevant substances due to its high content. The chemical compositions of the Stryphnodendron genus indicate the presence of sapogenines and proanthocyanidins (Tursch et al, 1963), gallocatechin (Reicher et al, 1992) and monomeric, dimeric or trimeric condensed tannins (Lopes et al, 2009). Three species of Stryphnodendron genus [S. adstringens (Mart.)…”
Section: Discussionmentioning
confidence: 99%