Optimization of sample pretreatment for determination of polycyclic aromatic hydrocarbons in estuarine sediments by gas chromatography

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• 作者：Yan Wang (1)
  Xianguo Li (1)
  Xuewei Peng (1)
  Xuli Tang (1)
  Xiaoyan Deng (1)
  
• 关键词：ultrasonic extraction ; thin layer chromatography ; estuarine sediment ; PAHs
• 刊名：Journal of Ocean University of China
• 出版年：2012
• 出版时间：June 2012
• 年：2012
• 卷：11
• 期：2
• 页码：159-164
• 全文大小：320KB
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• 作者单位：Yan Wang (1)
  Xianguo Li (1)
  Xuewei Peng (1)
  Xuli Tang (1)
  Xiaoyan Deng (1)
  
  1. Key Laboratory of Marine Chemical Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, P. R. China
  
• ISSN：1993-5021

文摘

This study examined levels of polycyclic aromatic hydrocarbons (PAHs) in estuarine sediments in Licun (Qingdao, China) by gas chromatography under optimized conditions for sample pretreatment via ultrasonic extraction, column chromatography, and thin layer chromatography. Methanol and dichloromethane (DCM)/methanol (2:1, v/v) were used in ultrasonic extraction, and DCM was used as eluate for column chromatography. The developing system consisted of n-hexane and DCM at a ratio of 9:1 (v/v), with DCM as the extraction solvent for PAHs-containing silica gel scraped off the plate. When the spiking level is 100 ng, total recoveries of spiked matrices for four target PAHs (phenanthrene, anthracene, pyrene and chrysene) were 83.7%, 76.4%, 85.8%, and 88.7%, respectively, with relative standard deviation (RSD) between 5.0% and 6.5% (n = 4). When the spiking level is 1000 ng, associated total recoveries were 78.6%, 72.7%, 82.7% and 85.3%, respectively, with RSD between 4.4% and 5.3% (n = 4). The optimized method was advantageous for determination of PAHs in complex matrix due to its effective sample purification.