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在中草药有效成分提取、分离的实验中,常需要进行大量提取液的溶剂回收工作。在一般实验室里多采用大的圆底烧瓶(5000或10000ml)进行减压蒸馏,使用这种装置每蒸馏完一瓶必须取下胶塞加液。这种装置存在二点不足:(1)胶塞上安有与冷凝管相连的玻管,取下、安上都不方便,既易损坏仪器,又较难安紧影响减压效果;(2)由于一次加液较多,有些溶液在减压蒸馏初期极易爆沸。作者对此进行改进,在胶塞
In the experiment of extracting and separating the effective components of Chinese herbal medicines, it is often necessary to recover the solvent of a large amount of extracts. In general laboratories, large-scale round-bottomed flasks (5000 or 10000 ml) are used for vacuum distillation, and a stopper must be removed after each distillation of this device. There are two shortcomings of this device: (1) The glass tube connected to the condenser tube is installed on the rubber plug, which is inconvenient to remove and install, which is not only easy to damage the instrument, but also difficult to affect the decompression effect; (2 ) Due to more liquid addition at once, some solutions are prone to bumping in the initial stage of vacuum distillation. The author made improvements in the rubber plug