| 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 µg/kg. However, poor recoveries were observed for raspberry ketone and zingerone. Quantitative data showed that volatile concentrations varied for different cultivars. Large variations for α-ionone, β-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, α-ionone, α-pinene, linalool, terpinen-4-ol, δ-octalactone, δ-decalactone, and 6-methyl-5-hepten-2-ol were studied using a CyclosilB column. α-Ionone, α-pinene, δ-octalactone, and δ-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.
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