fulltext.study @t Gmail

Improving the desorption of Inga edulis flavonoids from macroporous resin: Towards a new model to concentrate bioactive compounds

Paper ID Volume ID Publish Year Pages File Format Full-Text
19123 43045 2013 7 PDF Available
Title
Improving the desorption of Inga edulis flavonoids from macroporous resin: Towards a new model to concentrate bioactive compounds
Abstract

The cumulative recovery of Inga edulis flavonoids from a fixed-bed adsorber was evaluated using an empirical sigmoid model, aiming at optimise the maximum solute desorption. Ethanol:water mixtures (20–100%, v/v) were applied to desorb the bioactive compounds from the column filled with Amberlite XAD-7 resin. Flavanol and flavonol content of the eluate were monitored with fast spectrophotometric measurements and these determinations were then validated using chromatographic analysis. The modelling results showed that a three-parameter sigmoid model fitted well to the cumulative flavonoid recovery data and the coefficients of multiple determination were higher than 0.99 for all ethanol proportions. Moreover, the estimated parameters of the model provided qualitative and quantitative desorption information, including the rate of desorption and the maximum recovery value. Interestingly, the rate of desorption presented a linear relationship with the ethanol proportion, while a quadratic behaviour was observed for the maximum recovery. In the optimised condition, four bed volumes of an 80% ethanol–water mixture permitted the desorption of almost 100% of the flavonoids from the column. All fractions presented particularly elevated antioxidant capacity (17.84 ± 5.23 μmol TE/mg GAE), when measured by the oxygen radical antioxidant capacity per total phenolic content. This modelling procedure appears to be useful when one is focusing on rapidly concentrating bioactive compounds.

► Cumulative desorption data of flavonoids were well described by a sigmoid model. ► Sigmoid model parameters correlated well with the ethanol concentrations. ► Recoveries higher than 98% were achieved with four bed volumes of eluting solution. ► The desorption system yielded concentrated extracts with high antioxidant activity.

Keywords
Flavanols; Flavonols; Antioxidant concentration; Sigmoidal model; Antioxidant capacity
First Page Preview
Improving the desorption of Inga edulis flavonoids from macroporous resin: Towards a new model to concentrate bioactive compounds
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Food and Bioproducts Processing - Volume 91, Issue 4, October 2013, Pages 558–564
Authors
, , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us