Fast analysis of derivatives of polycyclic aromatic hydrocarbons in soil by ultra-high performance supercritical fluid chromatography after supercritical fluid extraction enrichment

• 作者: Ye-Hua Han Li-Min Ren Yan-Fen Zhang Ying-Hao Wang Cheng-Long Dong Jing Xie Yu-Chi Zhang Wen Zhou
• 来源期刊: 石油科学（英文版）
• 年，卷（期）: 2021,（6）
• 所属期刊栏目: Petrochemistry & Chemical Engineering
• 页码范围: 1860-1866
• 页数: 7页
• 语种: 英文

摘要

An efficient and environment-friendly method for simultaneous determination of 13 typical derivatives of polycyclic aromatic hydrocarbon (PAH) in petroleum-polluted soil with nitro-,oxy-and alkyl-functional group was developed using supercritical fluid extraction (SFE) followed by ultra-high per-formance supercritical fluid chromatography (UHPSFC).Parameters of UHPSFC,including type of sta-tionary phase and mobile phase modifiers,gradient elution process,backpressure,column temperature,and the flow rate of mobile phase,were systematically optimized,achieving a fast separation within 4.2 min.Limits of detection (LOD) were 0.005-0.1 μg mL-1 or 0.1-2.0 ng g-1,respectively,with a good repeatability (RSD＜5.0％).Before UHPSFC-PDA analysis,the PAH-derivatives in soil samples were effec-tively enriched in 15.0 min using SFE with an online carbon nanotubes (CNTs) collection trap.The soil samples were analyzed by the proposed method and the results were verified by GC-MS.Thus,SFE equipped with an online CNTs trap followed by UHPSFC-PDA analysis,which only consumed about 2.0 mL organic solvent for a whole run,has been demonstrated to be an efficient way for screening and quantitative analysis of trace-level PAH-derivatives in soil samples.