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1·A method for analysis n-alkanes, steranes and terpanes in oil by internal standard method was established.

采用内标法建立了原油中正构烷烃、生物标志物(甾、萜烷类)的分析方法。

2·Moreover, water has no obvious effect on the hydrogen isotopic compositions of individual n-alkanes in the simulation test.

热模拟实验中水的存在对热解烃中正构烷烃单体氢同位素组成并没有产生明显的影响。

3·The distribution pattern of the carbon isotopic compositions of the individual n-alkanes shows almost no change during this process.

同时也证明了生排烃过程不影响正构烷烃单体碳同位素组成曲线的形状；

4·Selection of solvent is the key for extraction to separate n-alkanes from diesels and to improve the flow ability of diesels at low temperature.

溶剂筛选是溶剂萃取脱除柴油中正构烷烃，改善柴油低温流动性能工艺过程的关键。

5·Chapter 1 introduced the importance of n-alkanes in organic geochemical study and the proposed main factors that affected the concentration of particulate or dissolved n-alkanes.

第一章重点阐释了正构烷烃的研究意义、影响颗粒态、溶解态正构烷烃含量的主要因素、国内研究现状和本文的研究意义。

6·The oils with high content of n-alkanes and those with low content were classified clearly by this developed method, but it still had some constraint to differentiating oils with little difference.

该方法对正构烷烃差异较大的油品进行了很好的区分，但对差异较小的油品其分辨能力仍有一定局限性。