Is vacuum with stirring as good as vacuum with sonication? What about sonication alone? Prolonged vacuum will compromise solvent composition, resulting in too much of a good thing.

• 是否真空加上扰动也和真空加上超声的脱气效果一样呢？只用超声脱气又如何？真空时间长了会影响溶剂的组成，结果过犹不及。