The seperation and enrichment of polycyclic aromatic hydrocarbons (PAH) was done by increasing polarity of the eluent step by step.

• 研究中采用逐步增加洗脱液极性的方法实现多环芳烃组分的分离、富集，从而达到测定烷基萘和烷基菲等化合物碳同位素组成的条件；