They used liquid and gas chromatography to fractionate the sample into its molecular constituents; an electron beam then fragmented the separated molecules in a mass spectrometer to produce a spectrum indicating the basic chemical components.

• 他们运用液相与气相层析法，将样本的组成分子分开，然后导入质谱分析仪，以电子束使已分离的分子断裂，进而产生出可识别基本化学组成的图谱。