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Effect of drying technique and particle size of bilberry press cake on the extraction efficiency of anthocyanins by pressurized carbon dioxide extraction
RISE - Research Institutes of Sweden, Bioscience and Materials, Agrifood and Bioscience.
Agrosup Dijon, Engineering School, Dijon, France.
RISE - Research Institutes of Sweden, Bioscience and Materials, Agrifood and Bioscience.
2017 (English)In: Lebensmittel-Wissenschaft + Technologie, ISSN 0023-6438, E-ISSN 1096-1127Article in journal (Refereed) In press
Abstract [en]

To improve the extraction efficiency of anthocyanins from bilberry press cake using pressurized carbon dioxide, the combined effect of drying technique and bilberry press cake particle size was assessed. Pressurized carbon dioxide using ethanol as co-solvent was compared with a simple and efficient solvent extraction using methanol. The press cake with large (>710 mm) size particles had a higher anthocyanins content (84 g/kg dry matter to 87 g/kg dry matter) than did the small (<710 mm) size particles (60 g/kg dry matter to 65 g/kg dry matter). Although, the large size particles contained more anthocyanins, more efficient anthocyanins extraction using pressurized carbon dioxide extraction was obtained with the small than the large size particles. The press cake dried by freeze-drying generated a powder with smaller particles and lower bulk density than either the microwave-assisted hot-air-dried or hot-airdried powders. In comparison to methanol extraction, the most efficient anthocyanins extraction was obtained from the freeze-dried small size particles. This work showed that there is a potential to improve the extraction efficiency of anthocyanins extracted by pressurized carbon dioxide by selecting appropriate drying technology and particle size distribution of the press cake.

Place, publisher, year, edition, pages
2017.
Keyword [en]
Extraction efficiency, Freeze-drying, Microwave drying, Particle size distribution, Anthocyanins, Carbon dioxide, Drying, Efficiency, Light transmission, Low temperature drying, Methanol, Organic solvents, Particle size, Particle size analysis, Presses (machine tools), Size distribution, Solvent extraction, Supercritical fluid extraction, Drying technology, Extraction efficiencies, Freeze drying, Large-size particles, Microwave assisted, Pressurized carbon dioxide, Small size particles, Extraction
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Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-29380DOI: 10.1016/j.lwt.2017.03.030ScopusID: 2-s2.0-85016005938OAI: oai:DiVA.org:ri-29380DiVA: diva2:1093756
Available from: 2017-05-08 Created: 2017-05-08 Last updated: 2017-05-08Bibliographically approved

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CiteExportLink to record
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Citation style
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