METHODS The method of steam distillation was applied to extract the essential oils from the fresh leaves,flowers and peels of Citrus aurantium L.var daidai Tanaka in Fujian province.

• 方法采用水蒸气蒸馏法分别从闽产代代的新鲜叶、花及果中提取挥发油,运用气相色谱-质谱联用法,分析比较其中化学成分的组成差别,并用归一法测定各组分的相对含量。