[Influence of different processing methods on volatile components of Atractylodis Rhizoma based on HS-GC-MS technology].

The volatile components of Atractylodis Rhizoma have obvious pharmacological effects and are considered to be the main dry components of Atractylodis Rhizoma. The differences of different processed products of Atractylodis Rhizoma were analyzed from the perspective of volatile oil changes to explain the reasons for dryness reduction and efficacy increase of Atractylodis Rhizoma after processing. HS-GC-MS technology was used to obtain the volatile components of raw Atractylodis Rhizoma, bran-fried Atractylodis Rhizoma, roasted Atractylodis Rhizoma, and rice-water processed Atractylodis Rhizoma under four different processes, and then SIMCA software was used to analyze the volatile oil components of Atractylodis Rhizoma and its different processed products. A total of 87 volatile components were identified in the HS-GC-MS results. A total of 76 volatile components were identified in raw products; 79 volatile components were identified in bran-fried Atractylodis Rhizoma; 70 volatile components were identified in Zhangbang rice-water processed Atractylodis Rhizoma; 81 volatile components were identified in roasted Atractylodis Rhizoma; 78 volatile components were identified in Hunan rice-water processed Atractylodis Rhizoma; 73 volatile components were identified in Jilin rice-water processed Atractylodis Rhizoma, and 77 volatile components were identified in Shanghai rice-water processed Atractylodis Rhizoma. Through multivariate statistical analysis, it was found that there were significant differences between the processed products of Atractylodis Rhizoma. Then, a total of 28 significant differential components between the symbiotic products and the six processed products were established by the OPLS-DA model. Among them, 11 volatile components that generally increased significantly after processing were α-pinene, phellandrene,(1S)-(+)-3-carene, o-isopropyltoluene, D-limonene, α-ocimene, α-isoterpinene, silphiperfol-5-ene,silphinene, γ-alkenyl, and germacrene B, which may be related to their synergistic effect. Five volatile components that generally decreased significantly after processing were β-elemene, 1-methyl-4-(6-methylhept-5-en-2-yl) cyclohexa-1, 3-diene, β-selinene,β-sesquiphellandrene, and atractylon, which may be related to their dryness.