Isobutane is typically used as a co-blowing agent with other hydrocarbons, so the effect of its low boiling point is somewhat diluted. 异丁烷一般是用于与其它碳氢化合物共混发泡，因此，其低沸点的特性对发泡的负面影响并不大。
These higher boiling components will be removed by vacuum distillation of the provided sample to permit facile gas chromatographic separation. 为了能顺利地进行气相色层分离，可以对所提供的样品进行真空蒸馏，把较高沸点的混合物除去。
