本文以减压馏分油为原料,使用超声尿素、硫脲混合包合法进行链烷烃和环烷烃的分离试验,用气质联用和核磁进行了分析比对。采用异丙醇作活化剂,满足条件异丙醇/样品为7.5、包合反应温度为38～43℃时,链烷烃含量和环烷烃含量的相对标准偏差分别为0.72%和0.51%。链烷烃中正构烷烃的碳数分布范围为C20~C38,其中环烷碳的含量低于NMR的检测限,环烷烃的总离子流色谱图显示出其中的链烷烃含量很低。该方法可应用在重质油中链烷烃和环烷烃的分离分析测定。 In this paper, vacuum distillation distillate as raw material, the use of ultrasonic urea, thiourea mixed inclusion paraffin and naphthenic separation test, the use of GC-MS and NMR analysis and comparison. The relative standard deviation of paraffin content and naphthene content was 0.72% and 0.51% respectively when isopropanol was used as activator to meet the conditions of isopropanol / sample of 7.5 and the inclusion reaction temperature of 38 ~ 43 ℃. The n-alkanes have a carbon number range of C20 to C38, where the naphthenic carbon content is below the NMR limit of detection and the naphthenic total ion chromatogram shows a very low paraffinic content. The method can be applied to the separation and analysis of paraffins and naphthenes in heavy oil.