Pedosphere 15(5): 628--633, 2005
ISSN 1002-0160/CN 32-1315/P
©2005 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Comparison of extraction techniques with different solvents for DDT analogues in sediments |
LANG Yin-Hai1 , JIANG Xin2, D. MARTENS3 and ZHAO Qi-Guo2 |
1 College of Environmental Science and Engineering, Ocean University of China, Qingdao 266003 (China). E-mail: yhlang@ouc.edu.cn
2 Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China)
3 Institute of Ecological Chemistry, GSF-National Research Center for Environment and Health, Neuherberg 85764 (Germany) |
| ABSTRACT |
| Four techniques, Soxhlet extraction (SOX), ultrasonic extraction (USE), fluidized-bed extraction (FBE) and accelerated solvent extraction (ASE) with different solvents (methanol, hexane/acetone and acetonitrile) were used for the extraction of DDT analogues in sediments. Results revealed that the four extraction techniques had high recoveries (> 86.0%) with low standard deviations (< 12.0%) for most of DDT analogues, meaning that they could all successfully extract DDT analogues in sediments. Accelerated solvent extraction using methanol and hexane/acetone (1:1), fluidized-bed extraction using hexane/acetone (1:1) and the ultrasonic extraction using hexane/acetone (1:1) were comparable or better than Soxhlet extraction using hexane/acetone (1:1). Considering solvent- and time-consumption, level of automation, and environmental risk, accelerated solvent extraction with hexane/acetone (1:1) was better than the other extraction techniques. |
| Key Words: DDT analogues, extraction techniques, sediment, solvents |
| Citation: Lang, Y. H., Jiang, X., Martens, D. and Zhao, Q. G. 2005. Comparison of extraction techniques with different solvents for DDT analogues in sediments. Pedosphere. 15(5): 628-633. |
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