Characteristics of the Steam-Distilled Oil and Carbon Dioxide Extract of Zanthoxylum simulans Fruits

The volatiles were isolated from fruits of Zanthoxylum simulans Hance using steam distillation and liquid carbon dioxide extraction, respectively, and analyzed by GC, GC−MS (both EI and CI modes), and GC−FTIR. Totally, 43 compounds were identified in the volatiles, including 20 terpenes, 10 alcohols, 8 esters, and 5 other components. Using chemical ionization, only terpenes became protonated ions, for which accurate molecular weights could be obtained. The yield in steam distillation was 1.69% (w/w), while that in liquid carbon dioxide extraction was 6.38% (w/w). The major volatile components (>10%) found in both volatiles were β-myrcene, limonene, 1,8-cineole, and ( Z )-β-ocimene. Some minor components, including isobutyl acetate, isoamyl acetate, and α-terpinene, were not found in the extract of liquid carbon dioxide. Keywords: Zanthoxylum simulans; characteristics; essential oil; carbon dioxide extract