快速溶剂萃取提取PM10中多环芳烃含量的方法研究

本文主要研究了用快速溶剂萃取（ASE）的方法提取PM10中16种多环芳烃,对ASE的条件做了详细的优化,得到在二氯甲烷与正己烷体积比为2：1,萃取温度为120℃的最佳萃取条件。文中还对ASE、超声提取和索氏提取三种提取方法做了比较,结果表明ASE的萃取效率高于后两者。精密度考察实验中得到6种替代物的回收率在58.7%-108.2%之间,16种PAHs平均回收率在88.3%-104.0%之间,相对标准偏差均低于9.0%。研究中用ASE-气相色谱三重四级杆质谱测定了车公庄地区2013年1月份到4月份的PM10的样品,结果表明2013年前四个月中PAHs的总浓度在5.9ng/m3-612.5ng/m3之间。可以看出ASE前处理方法有效可靠,适宜推广。

Study of Polycyclic Aromatic Hydrocarbons in PMIO by Accelerated Solvent Extraction

Majority of this paper is about studying of the extraction of polycyclic aromatic hydrocarbons in PM10 by accelerated solvent extraction （ASE）.After the optimization of ASE conditions,ratio of dichloromethane and n-hexane volume is 2：1.The ratio is obtained under extraction temperature 120℃ .The ASE and two traditional methods,ultrasonic extraction and Soxhlet extraction,were compared. Results showed that the extraction efficiency of ASE is higher than that two traditional methods.The precision test showed that 6 substitutes recoveries were range from 58.7%-108.2%,average recoveries of 16 PAHs were between 88.3%-104.0%,relative standard deviation all were below 9.0%.This paper analyzed PM10 samples of Che Gongzhuang station in 2013 January to April by ASE--- gas chromatography coupled to triple quadrupole mass spectrometry.Through this way, researchers observed that the total concentrations of PAHs were between 5.9ng/m3--612.5ng/m3 in the first four months of 2013.The results showed that ASE pretreatment method is effective and reliable, it is suitable for promotion.