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Document Type: Artigo
Title: Preliminary assessment of the chemical stability of dried extracts from Guazuma ulmifolia Lam. (Sterculiaceae)
Authors: Lopes, Gisely Cristiny
Renata, Longhini
Santos, Paulo Victor Pires dos
Araújo, Adriano Antunes de Souza
Bruschi, Marcos Luciano
Mello, João Carlos Palazzo de
Issue Date: 2012
Abstract: We report the results of a preliminary estimation of the stability of the dried extract from bark of Guazuma ulmifolia Lam. (“Mutamba”), with and without added colloidal silicon dioxide (CSD). The physical and chemical properties and the compatibility of CSD in the extract were evaluated for 21 days of storage under stress conditions of temperature (45 ± 2◦C) and humidity (75 ± 5%). Thermogravimetry (TG) was supplemented using selective high-performance liquid chromatography (HPLC) for determination of stability of the characteristic constituents (chemical markers), namely, procyanidin B2 (PB2) and epicatechin (EP). The results showed that PB2 is an appropriate compound to be used as a chemical marker in the quality control of dried extracts of G. ulmifolia. The stress study showed that there was no significant difference between the two formulations. However, considering the TG data and the high temperatures involved, the results suggest that CSD increases the stability of the dried extract of G. ulmifolia.
Keywords: Guazuma ulmifolia
Análise química
ISSN: 1687-8779
Citation: LOPES, G. C. et al. Preliminary assessment of the chemical stability of dried extracts from Guazuma ulmifolia Lam. (Sterculiaceae). International Journal of Analytical Chemistry, Cairo, v. 2012, 2012. Disponível em: <>. Acesso em: 11 jun. 2013.
License: Creative Commons Attribution License
Appears in Collections:DFA - Artigos de periódicos

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