Characterization of Aroma Compounds in Moso Bamboo (Phyllostachys edulis Mazel ex Houz. De ehaie) Stem Powders Using Solid Phase Microextraction.

The aim of this study was to characterize aroma compounds from Moso bamboo (Phyllostachys edulis Mazel ex Houz. De ehaie) stem powders with a headspace solid phase microextraction - gas chromatography/mass spectrometry method and reconstruct the fresh stem aroma. A total of 32 aroma compounds were identified from the powders, comprising monoterpene hydrocarbons (40.03%), hydrocarbons (26.27%), aliphatic aldehydes (13.82%), norisoprenoids (7.93%), sesquiterpene hydrocarbons (3.40%), aliphatic ketones (2.47%), an aromatic alcohol (1.34%) and an acid (1.30%). The most abundant aroma compound was limonene (32.95%) and the absolute configuration and optical purities were determined as (R)-form with 98.17 ± 0.27% enantiomeric excess. The odor active values (OAVs) showed thirteen aroma active compounds (OAVs > 1.00) were determined, including seven aliphatic aldehydes, three monoterpene hydrocarbons, two norisoprenoids and one aliphatic ketone. We have compared the aroma profiles between the Moso bamboo stem powders and a reconstructed one on the basis of quantitative data and characterized the active compounds that can be responsible for the fresh stem aroma by sensory evaluation.