Volatile composition in raspberry cultivars grown in the Pacific Northwest determined by stir bar sorptive extraction-gas chromatography-mass spectrometry

J Agric Food Chem. 2008 Jun 11;56(11):4128-33. doi: 10.1021/jf073489p. Epub 2008 May 13.

Abstract

Twenty-nine volatile compounds in 'Chilliwack', 'Tulameen', 'Willamette', 'Yellow Meeker', and 'Meeker' raspberries were quantified using stir bar sorptive extraction (SBSE) paired with gas chromatography-mass spectrometry (GC-MS). Good correlation coefficients were obtained with most aroma-active compounds in raspberry, with quantification limits of 1 microg/kg. However, poor recoveries were observed for raspberry ketone and zingerone. Quantitative data showed that volatile concentrations varied for different cultivars. Large variations for alpha-ionone, beta-ionone, geraniol, linalool, and ( Z)-3-hexenol were observed in different raspberry cultivars. In addition, the volatile compositions in 'Meeker' raspberry grown at different locations also varied. The chiral isomeric ratios of raspberry ketone, alpha-ionone, alpha-pinene, linalool, terpinen-4-ol, delta-octalactone, delta-decalactone, and 6-methyl-5-hepten-2-ol were studied using a CyclosilB column. alpha-Ionone, alpha-pinene, delta-octalactone, and delta-decalactone had strong chiral isomeric preference, with more than 96% for one isomeric form. Much weaker chiral isomeric preference was observed for terpinen-4-ol, while linalool was almost a racemic mixture. Both growing locations and cultivars affect the isomeric ratio of linalool with a range of 37-51% for ( R)-linalool.

Publication types

  • Comparative Study

MeSH terms

  • Alcohols / analysis
  • Aldehydes / analysis
  • Fruit / chemistry*
  • Gas Chromatography-Mass Spectrometry / methods*
  • Ketones / analysis
  • Odorants / analysis*
  • Oregon
  • Rosaceae / chemistry*
  • Rosaceae / growth & development
  • Species Specificity
  • Terpenes / analysis
  • Volatilization

Substances

  • Alcohols
  • Aldehydes
  • Ketones
  • Terpenes