首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Automated high-capacity sorption probe for extraction of organic compounds in aqueous samples followed by gas chromatographic analysis
Authors:Pettersson Johan  Kloskowski Adam  Zaniol Carlo  Roeraade Johan
Institution:Department of Analytical Chemistry, Royal Institute of Technology, SE-10044 Stockholm, Sweden.
Abstract:An automated high-capacity sorption device for GC analysis of ultra trace components has been developed. The scope of the presented technique was to combine the simplicity of solid-phase microextraction (SPME) with the high extraction efficiency of the stir bar sorptive extraction technology. Sorptive extractions of water samples were performed using polydimethylsiloxane (PDMS) rubber tubing (120 microl) mounted onto a glass rod. The sampling procedure was carried out by a robotic autoinjector. Since the setup is fully automated, unattended and precise time-controlled extraction of samples is possible and makes quantitation with non-equilibrium extractions feasible. The sorption probes are easy to exchange, which facilitates off-line/in-field sampling. The system was evaluated with a test mixture of 44 environmentally hazardous compounds. Detection limits were found to be in the sub-ppt region. The performance of the system was demonstrated with the analysis of polycyclic aromatic hydrocarbons in urban snow.
Keywords:Sorption  Extraction methods  Automation  Water analysis  Environmental analysis  Polynuclear aromatic hydrocarbons
本文献已被 ScienceDirect PubMed 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号