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Countercurrent supercritical fluid extraction of phenolic compounds from aqueous matrices

Persson, Per LU ; Barisic, Zoran LU ; Cohen, Arieh LU ; Thörneby, Lars LU and Gorton, Lo LU (2002) In Analytica Chimica Acta 460(1). p.1-12
Abstract
Low-molecular weight aromatic compounds were extracted from aqueous samples in a packed high-pressure stainless steel column with supercritical carbon dioxide. A countercurrent flow approach was utilised to remove several phenolic and two non-phenolic compounds with similar aromatic structures directly from aqueous standard solutions as well as a real sample (a lignocellulose dilute-acid hydrolysate of spruce) with supercritical carbon dioxide without sample pre-treatment. Phenolics are a diverse group of compounds that vary with regard to number, position and nature of their functional groups. The main purpose of this work was to investigate the influence of substituents on the extraction efficiency during countercurrent supercritical... (More)
Low-molecular weight aromatic compounds were extracted from aqueous samples in a packed high-pressure stainless steel column with supercritical carbon dioxide. A countercurrent flow approach was utilised to remove several phenolic and two non-phenolic compounds with similar aromatic structures directly from aqueous standard solutions as well as a real sample (a lignocellulose dilute-acid hydrolysate of spruce) with supercritical carbon dioxide without sample pre-treatment. Phenolics are a diverse group of compounds that vary with regard to number, position and nature of their functional groups. The main purpose of this work was to investigate the influence of substituents on the extraction efficiency during countercurrent supercritical fluid extraction (SFE). The extraction column was 1100 mm long with an inner diameter of 25 mm. It was filled with Sulzer packings to increase the contact area between the solvent and the sample. The results showed that extraction efficiencies ranging from 2 to 100% in the standard solutions and 11 to 98% in the hydrolysate could be achieved depending on the various substituents. No correlation was observed between polarity indexes and extraction efficiencies for the investigated compounds; however, a relationship between retention in RP-HPLC and extractability could be established. (C) 2002 Elsevier Science B.V. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
extractability, aqueous samples, countercurrent SFE, phenolics, LC-MS, analysis
in
Analytica Chimica Acta
volume
460
issue
1
pages
1 - 12
publisher
Elsevier
external identifiers
  • wos:000176287000001
  • scopus:0037188632
ISSN
1873-4324
DOI
10.1016/S0003-2670(02)00147-2
language
English
LU publication?
yes
id
5fdbb582-33ca-46e3-904b-f9c5ca9c5809 (old id 335358)
date added to LUP
2007-11-08 14:31:02
date last changed
2017-01-01 07:15:48
@article{5fdbb582-33ca-46e3-904b-f9c5ca9c5809,
  abstract     = {Low-molecular weight aromatic compounds were extracted from aqueous samples in a packed high-pressure stainless steel column with supercritical carbon dioxide. A countercurrent flow approach was utilised to remove several phenolic and two non-phenolic compounds with similar aromatic structures directly from aqueous standard solutions as well as a real sample (a lignocellulose dilute-acid hydrolysate of spruce) with supercritical carbon dioxide without sample pre-treatment. Phenolics are a diverse group of compounds that vary with regard to number, position and nature of their functional groups. The main purpose of this work was to investigate the influence of substituents on the extraction efficiency during countercurrent supercritical fluid extraction (SFE). The extraction column was 1100 mm long with an inner diameter of 25 mm. It was filled with Sulzer packings to increase the contact area between the solvent and the sample. The results showed that extraction efficiencies ranging from 2 to 100% in the standard solutions and 11 to 98% in the hydrolysate could be achieved depending on the various substituents. No correlation was observed between polarity indexes and extraction efficiencies for the investigated compounds; however, a relationship between retention in RP-HPLC and extractability could be established. (C) 2002 Elsevier Science B.V. All rights reserved.},
  author       = {Persson, Per and Barisic, Zoran and Cohen, Arieh and Thörneby, Lars and Gorton, Lo},
  issn         = {1873-4324},
  keyword      = {extractability,aqueous samples,countercurrent SFE,phenolics,LC-MS,analysis},
  language     = {eng},
  number       = {1},
  pages        = {1--12},
  publisher    = {Elsevier},
  series       = {Analytica Chimica Acta},
  title        = {Countercurrent supercritical fluid extraction of phenolic compounds from aqueous matrices},
  url          = {http://dx.doi.org/10.1016/S0003-2670(02)00147-2},
  volume       = {460},
  year         = {2002},
}