%0 Journal Article
%T Study on the Collecting Methods in Supercritical Fluid Extraction for Polycyclic Aromatic Hydrocarbons from the Synthetic Environmental Samples<br>超临界流体萃取环境模拟样品中多环芳烃的收集方法研究
%A Gao Liancun
%A Cui Zhaojie
%A Zhang Chunyang
%A Wang Shuren
%A <br>高连存
%A 崔兆杰
%A 张春阳
%A 王淑仁
%J 色谱
%D 1996
%I 
%X The influences of the kinds and the volumes of collecting solvents and the cryogenic cooled trap method of solid surfaces on the recoveries of the extracted polycyclic aromatic hydrocarbons (PAHs) from the synthetic environmental sample after supercritical fluid extraction(SFE) were studied.The results show that the off-line collection of extracted PAHs after SFE is an important step for successful extraction.Methylene chloride and acetone are better collecting solvents for the extracted PAHs.The collecting recoveries of the PAHs after SFE are in the range of 61. 44% to 105.40% But n -hexane, cyclohexane and toluene are the poor ones.The volumes of collecting solvent are unimportant when the height of the liquid surface of the collecting solvent is higher than 2.0cm,and if it is lower than 2.0cm.the extracted PAHs cannot dissolve in the solvent,and result in the decrease of collecting efficiencies of the extracted PAHs.The cooled trap method of solid surfaces including the typical surface which have been used are glass vials(flasks),stainless steel plate or beads,glass beads,and deactivated fused silica is better for collecting the extracted PAHs. The collecting efficiencies of the PAHs are in the range of 60.98% to 109.88% ,but the relative standard deviation(RSD%) is larger to.28%-11.29%) than the solvent collecting methods.
%K apillary gas chromatography
%K synthetic environmental sample
%K polycyclic aromatic hydrocarbons (PAHs)
%K supercritical fluid extraction(SFE)
%K sample collecting methods<br>毛细管
%K 气相色谱
%K 多环芳烃
%K 超临界流体萃取
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=6579068328FE643F&jid=4D81E042D77AFEC6881D14759692069C&aid=473278D7608BFF3EF0E3D01F3501A5E8&yid=8A15F8B0AA0E5323&vid=F3583C8E78166B9E&iid=CA4FD0336C81A37A&sid=CA4FD0336C81A37A&eid=E158A972A605785F&journal_id=1000-8713&journal_name=色谱&referenced_num=14&reference_num=0