Application of comprehensive two-dimensional gas chromatography/time-of-flight mass spectrometry to analysis of zedoary volatile oil

After optimizing the chromatographic conditions including column system, temperature program and modulation parameters an analytical method of zedoary volatile oil was established based on comprehensive two-dimensional gas chromatography/time-of-flight mass spectrometry ( GC X GC/ TOFMS). The analysis of the individual components and groups were achieved. Under the optimized conditions the components of zedoary volatile oil from Guangxi province, China were identified by GCXGC/ TOFMS. Among 249 components with similarities over 800, there are 18 terpenes, 34 oxygenated terpenes, 35 sesquiterpenes and 37 oxygenated scsquiterpenes. Sixty-nine of these components have the individual volume fractions of over 0.02%