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Saponificação assistida por micro-ondas na extração de diterpenos em café arábica torrado

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dc.contributor.author Bianchin, Mirelli
dc.contributor.author Yamashita, Fabio
dc.contributor.author Benassi, Marta de Toledo
dc.date.accessioned 2022-04-11T11:50:14Z
dc.date.available 2022-04-11T11:50:14Z
dc.date.issued 2017
dc.identifier.citation BIANCHIN, M.; YAMASHITA, F.; BENASSI, M. T. Saponificação assistida por micro-ondas na extração de diterpenos em café arábica torrado. Química Nova, São Paulo, v. 40, n. 9, p. 1039-1044, 2017. pt_BR
dc.identifier.issn 1678-7064
dc.identifier.uri http://dx.doi.org/10.21577/0100-4042.20170116 pt_BR
dc.identifier.uri http://www.sbicafe.ufv.br/handle/123456789/13461
dc.description.abstract The extraction of kahweol and cafestol involves saponification reaction. This step is important for the efficiency of the extraction as the diterpenes are susceptible to structural changes during hydrolysis. The microwave-assisted saponification has been successfully used in different matrices, but there is no previous report of the use of this technique in the saponification of diterpenes. Therefore, the effect of microwave-assisted saponification on the extraction of kahweol and cafestol in roasted coffee was evaluated. A 32 factorial experimental design was used in order to evaluate the effect of temperature (70, 80, and 90 ºC) and reaction time (4, 8, and 12 min). The quantification of diterpenes was performed by high-performance liquid chromatography and the results were compared to with those obtained by a method, which uses thermostatic bath for saponification. Temperature and time had a significant effect (p < 0.05) on diterpenes levels. For simultaneous saponification of kahweol and cafestol, the optimal reaction conditions were 80 ºC / 12 min. The use of microwave-assisted procedure lead to lower yields of kahweol (24%) and cafestol (35%) compared to reference method. However a significant reduction of reaction time (80%) was achieved, and the procedure also has the advantage of controlled process conditions and the possibility of extended scale. pt_BR
dc.format pdf pt_BR
dc.language.iso pt_BR pt_BR
dc.publisher Sociedade Brasileira de Química pt_BR
dc.relation.ispartofseries Química Nova;v.40, n.9, 2017
dc.rights Open Access pt_BR
dc.subject Kahweol pt_BR
dc.subject Cafestol pt_BR
dc.subject Microwave assisted saponification pt_BR
dc.subject Coffea arabica pt_BR
dc.subject.classification Cafeicultura::Qualidade de bebida pt_BR
dc.title Saponificação assistida por micro-ondas na extração de diterpenos em café arábica torrado pt_BR
dc.type Artigo pt_BR

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