探讨了直接加热法、直接水蒸汽法、间接水蒸汽法、减压蒸馏、酒精沉淀等五种回收方法的优缺点。
The advantage and disadvantage of the five recycling methods, direct heating, direct aqueous vapor, indirect aqueous vapor, reduced pressure distillation, precipitation method, is discussed.
采用微波辐照技术从山苍子中提取制备柠檬醛，使山苍子精油的提取率较传统的直接水蒸气蒸馏法平均提高36.5%以上。
By microwave irradiation, the citral was obtained from Litea cubeba fruits, the yield was risen in average 36.5% than by traditional distillation in a current of steam.
即用蒸馏水直接萃取烟草中的钾作为待测液，并与消化法分析结果进行了比较。
Namely, the potassium in tobacco was directly extracted with distilled water and then analyzed.
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