【摘 要】
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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 ex
【机 构】
：
State Key Laboratory of Heavy Oil Processing,China University of Petroleum,Beijing 102249,China;Stat
论文部分内容阅读
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.
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