Extraction of p-hydroxyacetophenone and catechin from Norway spruce needles. Comparison of different extraction solvents

Anal Bioanal Chem. 2005 Jun;382(4):1135-40. doi: 10.1007/s00216-005-3229-x. Epub 2005 May 20.

Abstract

The phenolic compounds p-hydroxyacetophenone and catechin have been extracted from Norway spruce needles with pure methanol, 80 and 50% (v/v) aqueous methanol, pure acetonitrile, 80% (v/v) aqueous acetonitrile, and pure water. Extraction efficiency of the individual solvents was compared. Although 80% aqueous methanol is the solvent most frequently used for extraction of soluble phenolic compounds from needles, it was found that pure methanol is a more suitable extraction solvent. Surprisingly, a two-step procedure based on the extraction of crushed needles with water then re-extraction with methanol proved a good alternative to direct extraction with methanol. Extraction of uncrushed spruce needles might indicate that relatively more p-hydroxyacetophenone than catechin was located in the surface layer of the needle.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acetonitriles / chemistry*
  • Acetophenones / analysis*
  • Catechin / analysis*
  • Methanol / chemistry*
  • Norway
  • Plant Leaves / chemistry*
  • Solvents / chemistry
  • Water / chemistry

Substances

  • Acetonitriles
  • Acetophenones
  • Solvents
  • Water
  • Catechin
  • 4-hydroxyacetophenone
  • Methanol
  • acetonitrile