The samples were filled into chromatographic columm, silica gel was used as stationary phase, and ethanol was used to replace the hydrocarbon adsorbed by silica gel.

• 将样品加到色谱柱内,用硅胶作固定相,用乙醇顶替被硅胶吸附的烃类,根据折光率大小,确定不同时间内流出烃类的组分。