Ultrasound-assisted headspace ionic-liquid microextraction of polycyclic aromatic hydrocarbons at elevated temperatures

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• 作者：Jing Xiao (1)
  Jing Cheng (1) chengjingok@mail.ccnu.edu.cn
  Feng Guo (1)
  Haili Hu (1)
  Sha Peng (1)
  Miao Zhang (1)
  Min Cheng (2) 494350301@qq.com
• 关键词：Headspace ionic liquid microextraction – Polycyclic aromatic hydrocarbons – High ; performance liquid chromatography – Fluorescence detection – Water analysis
• 刊名：Microchimica Acta
• 出版年：2012
• 出版时间：June 2012
• 年：2012
• 卷：177
• 期：3-4
• 页码：465-471
• 全文大小：210.0 KB
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• 作者单位：1. Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, 430079 China2. School of Mechanical Science and Engineering, Hua Zhong University of Science and Technology, Wuhan, 430074 China
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Analytical Chemistry
  Inorganic Chemistry
  Physical Chemistry
  Characterization and Evaluation Materials
  Monitoring, Environmental Analysis and Environmental Ecotoxicology
  
• 出版者：Springer Wien
• ISSN：1436-5073

文摘

We have developed a method for ultrasound-assisted ionic-liquid (IL) microextraction at elevated temperatures. A sealed pipette tip was used to hold the IL. The polycyclic aromatic hydrocarbons naphthalene, acenaphthene and fluorene were headspace-extracted into a 30-μL volume of the IL at 60 °C. Cooling is not needed to control the temperature of the extraction solvent because it has almost zero vapor pressure. Following extraction, the analyte-loaded IL was submitted to HPLC with fluorescence detection. Under the optimal conditions, the limits of detection (at S/N?=?3) are 30, 30 and 10 ng L?1 for naphthalene, acenaphthene and fluorene, respectively. Recoveries range from 86 to 110 %, and the extraction efficiency is better than previous methods by a factor of ~40. The technique was applied to the analysis of semivolatile pollutants (PAHs) in real aqueous samples.