Impact of texturing using instant pressure drop treatment prior to solvent extraction of anthocyanins from Malaysian Roselle ( Hibiscus sabdariffa)

Impact of texturing using instant pressure drop treatment prior to solvent extraction of anthocyanins from Malaysian Roselle ( Hibiscus sabdariffa)

Because of the natural structure of plants, which oppose resistance to penetration by any liquid, solvent extraction is very slow. The kinetics involves multiple serial steps and generally internal diffusion is the limiting process. To improve the technological aptitude, and intensify solvent extrac...

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Bibliographic Details
Published in:Food chemistry Vol. 115; no. 3; pp. 820 - 825
Main Authors: Ben Amor, B., Allaf, K.
Format: Journal Article
Language:English
Published: Kidlington Elsevier Ltd 01-08-2009
[Amsterdam]: Elsevier Science
Elsevier
Subjects:
Anthocyanins
Biological and medical sciences
chemical analysis
chemical composition
DIC
Diffusivity
equipment performance
Extraction
Food industries
Fundamental and applied biological sciences. Psychology
Hibiscus sabdariffa
instant controlled pressure drop
instant pressure drop treatment
medicinal plants
plant extracts
solvent extraction
texture
thermomechanical treatment
Anthocyanins
Extraction
Diffusivity
DIC
Malvaceae
Anthocyanin
Solvent extraction
Flavonoid
Hibiscus
Polyphenol
Pressure drop
Dicotyledones
Angiospermae
Pigments
Spermatophyta
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Summary:Because of the natural structure of plants, which oppose resistance to penetration by any liquid, solvent extraction is very slow. The kinetics involves multiple serial steps and generally internal diffusion is the limiting process. To improve the technological aptitude, and intensify solvent extraction, we propose to submit plants to a treatment by thermo-mechanical Instant Controlled Pressure Drop (DIC), in order to ensure the expansion of the plant structure. In this paper, we present the results of a study concerning the effect of DIC treatment on the extraction of Roselle anthocyanins. By identifying the effect of various operative parameters, we found that an appropriate DIC treatment improved both the kinetics and yield of extraction of anthocyanins from Roselle calyces. By studying extraction kinetics, we identified and quantified the effective diffusivity, which ranged from 4.62 to 6.11 × 10 −11 m 2 s −1 for DIC treated material compared with 4.19 × 10 −11 m 2 s −1 for raw material.
Bibliography:http://dx.doi.org/10.1016/j.foodchem.2008.12.094
ISSN:0308-8146
1873-7072
DOI:10.1016/j.foodchem.2008.12.094