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为了探索窿缘桉和尾叶桉叶挥发油含量和化学成分的周年变化规律,采用水蒸气蒸馏法提取其挥发油,采用GC-MS法分析挥发油化学成分,并以挥发油提取率为指标,确定桉叶的最佳采收期。结果表明,窿缘桉叶挥发油含量周年变化显著,5、9、10月份含量最高,为最佳采收期;尾叶桉叶挥发油含量周年变化较小,4、5、7月份含量相对较高,适宜采收。窿缘桉叶挥发油主要成分为α-蒎烯、β-蒎烯、桉树脑,含量变化显著。尾叶桉叶挥发油主要成分为α-蒎烯、桉树脑、冰片和α-松油醇,含量变化显著。不同时期桉叶挥发油化学成分含量有很大的差异。
In order to explore the annual variation of volatile oil content and chemical composition of Eucalyptus urophylla and Eucalyptus urophylla, the volatile oil was extracted by steam distillation. The chemical constituents of volatile oil were analyzed by GC-MS. The extraction rate of volatile oil The best harvest period. The results showed that the content of volatile oil in the eucalyptus urophylla marginal change was significant, the content was the highest in May, September and October, and the best harvest time; the content of volatile oil in leaves of Eucalyptus urophylla was smaller than that in April, May and July , Suitable for harvesting. The main components of volatile oil of eucalyptus leaves are α-pinene, β-pinene, and eucalyptus brain. The main components of volatile oil from the leaves of Eucalyptus urophylla were content of α-pinene, eucalyptol, borneol and α-terpineol. Eucalyptus leaves volatile oil content in different periods have great differences.