Webbläsaren som du använder stöds inte av denna webbplats. Alla versioner av Internet Explorer stöds inte längre, av oss eller Microsoft (läs mer här: * https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Var god och använd en modern webbläsare för att ta del av denna webbplats, som t.ex. nyaste versioner av Edge, Chrome, Firefox eller Safari osv.

Extraction of Antioxidants from Spruce (Picea abies) Bark using Eco-friendly Solvents

In English

Författare

  • Michelle Co
  • Amelie Fagerlund
  • Lars Engman
  • Kerstin Sunnerheim
  • Per J. R. Sjoberg
  • Charlotta Turner

Summary, in English

Introduction - Antioxidants are known to avert oxidation processes and they are found in trees and other plant materials. Tree bark is a major waste product from paper pulp industries; hence it is worthwhile to develop an extraction technique to extract the antioxidants. Objective - To develop a fast and environmentally sustainable extraction technique for the extraction of antioxidants from bark of spruce (Picea abies) and also to identify the extracted antioxidants that are abundant in spruce bark. Methodology - A screening experiment that involved three different techniques was conducted to determine the best technique to extract antioxidants. The antioxidant capacity of the extracts was determined with DPPH (2,2-diphenyl-1-picrylhydrazyl) assay. Pressurised fluid extraction (PFE) turned out to be the best technique and a response surface design was therefore utilised to optimise PFE. Furthermore, NMR and HPLC-DAD-MS/MS were applied to identify the extracted antioxidants. Results - PFE using water and ethanol as solvent at 160 and 180 degrees C, respectively, gave extracts of the highest antioxidant capacity. Stilbene glucosides such as isorhapontin, piceid and astringin were identified in the extracts. Conclusion - The study has shown that PFE is a fast and environmentally sustainable technique, using water and ethanol as solvent for the extraction of antioxidants from spruce bark. Copyright (C) 2011 John Wiley & Sons, Ltd.

Publiceringsår

2012

Språk

Engelska

Sidor

1-11

Publikation/Tidskrift/Serie

Phytochemical Analysis

Volym

23

Issue

1

Dokumenttyp

Artikel i tidskrift

Förlag

Wiley-Blackwell

Ämne

  • Organic Chemistry

Nyckelord

  • accelerated solvent extraction
  • antioxidant
  • DPPH
  • ethanol
  • Picea abies
  • pressurised fluid extraction
  • supercritical fluid extraction
  • water
  • stilbene glucosides

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1099-1565