一、知识网络二、重难点梳理(一)植物芳香油的提取1.植物芳香油的提取方法(1)基本方法有三种:蒸馏、压榨和萃取,具体采用哪种方法要根据植物原料的特点来决定。(2)根据原料放置的位置,蒸馏可分为水中蒸馏、水上蒸馏、水气蒸馏。①水中蒸馏:原料放在水中。缺点是会导致原 First, the knowledge network Second, focusing on difficulty and combing (a) the extraction of aromatic oil plants 1. Aromatic oil extraction methods (1) There are three basic methods: distillation, pressing and extraction, which method should be used according to the characteristics of plant raw materials To decide. (2) Distillation can be divided into distillation in water, distillation in water, and distillation in water vapor according to the place where the raw materials are placed. 1 Distilled in water: raw materials are placed in water. The disadvantage is that it will lead to the original