The flask can separate extraction chamber from waste liquids. Not only prevent crossed pollution, but also make it flexbile to deal the waste liquids.
特有的废液收集瓶将萃取部分与存放废液部分分离开，既防止了交叉污染，处理废液也更加方便。
2
A novel extraction apparatus was described and used to extract volatile phenols from water samples. The apparatus consisted of a magnetic stirring, a conical flask and a modified glass tap.