[Headspace solid-phase microextraction-gas chromatography-mass spectrometry for analysis of volatile components from Atractlodes macrocephala Koidz].

Headspace solid-phase microextraction (HS-SPME) technique was employed to extract the volatile components from Chinese traditional medicine, Atractlodes macrocephala Koidz. The volatile components were isolated and identified successfully by gas chromatography-mass spectrometry (GC-MS). The results from HS-SPME-GC-MS were compared with those obtained from steam distillation-GC-MS (SD-GC-MS) with a good agreement. The volatiles were collected using a polydimethylsiloxane-divinylbenzene (PDMS-DVB) fiber by HS-SPME. The best response was obtained when the extraction temperature was 70 degrees C, the equilibrium time and extraction time were all 30 min and the desorption time was 4 min. Analysis was performed by GC-MS with a polysiloxane capillary column (30 m x 0.25 mm, film thickness 0.25 microm) using He as the carrier gas and a programmed temperature run. Forty-one components accounting for 90.81% were identified. The main components (relative amount more than 1%) of the samples by HS-SPME were atractylone (40.12%), gamma-elemene (14.73%), aromadendrene (13.05%), eudesma-4 (14), 11-diene (5.46%), caryophyllene (2.56%), patchoulene (2.55%), 6,10,11,11-tetramethyl-tricyclo [6.3.0.1(2,3)] undec-7-ene (2.11%), cedrene (1.48%), alpha-caryophyllene (1.48%) and selina-4 (14) -7 (11) diene-8-one (1.01%). By SD-GC-MS, 31 components accounting for 88.19% were identified and all these components could be extracted by SPME except trans-beta-ocimene which accounts only 0.10%. The results showed that the HS-SPME technique can be used to extract the the volatile components from Atractlodes macrocephala Koidz. in place of the traditional time-consuming SD.