1. Preparation process of p cymene with gas phase catalytic dehydrogenation of industrial dipentene was studied and the following results were obtained.
   对工业双戊烯气相催化脱氢制备对伞花烃进行了研究并取得了理想结果。
2. Both the leaf and the stem aroma were composed mainly of monoterpene and sesquiterpene constituents, with β-caryophyllene the most major, followed by sabinene, 1,8-cineole, p-cymene ect.
   所鉴定出组分多数为单萜及倍半萜类化合物，在荆条叶、枝中含量最高的均为β-丁香烯、其次为香桧烯、1,8-桉叶素、对-聚伞花烃等。
3. A method was introduced for quantitative analysis of α-pinene,β-pinene,p-cymene and longifolene by 1102-Gas Chromatograph with the n-dodecane as internal standard.
   选用正十二烷为内标物,采用内标法对α-蒎烯、β-蒎烯、对伞花烃和长叶烯进行了定量分析。

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