Pedosphere 15(3): 386--394, 2005
ISSN 1002-0160/CN 32-1315/P
©2005 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Organophosphorus pesticide extraction and cleanup from soils and measurement using GC-NPD |
WANG Li-Gang 1, JIANG Xin2, MAO Ying-Ming2, ZHAO Zhen-Hua2 and BIAN Yong-Rong2 |
1 Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125 (China). Email: lgwang0827@yahoo.com.cn
2 Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China) |
| ABSTRACT |
| The objectives of this study were to optimize instrumental parameters and conditions for analysis of selected organop- hosphorus pesticides (OPPs) by gas chromatography (GC) with nitrogen-phosphorus detection (NPD) (GC-NPD); to select an appropriate solvent system; to conduct a comparison of sonication and shaking extractions; and to select an appropriate procedure for extracting organophosphorus pesticides from soils. Procedure I consisted of n-hexane or petroleum ether together with acetone used as solvents, while Procedure contained several solvents including acetone, methanol, dichloromethane, and n-hexane or petroleum ether. Experimental results indicated that a mixture of petroleum ether/acetone (2:1, v/v) could be used in place of n-hexane/acetone (2:1, v/v) as it was a less expensive solvent system. In addition, shaking under a water bath at 20 ℃ was more effective than sonication. Also, Procedure I was more effective, safer, and more timesaving than Procedure Procedure I was applied to three soil types of different organic matter content, with recoveries of the OPPs from the yellow-brown soils, which had a higher organic matter content, being lower than those from the yellow and red soils. |
| Key Words: cleanup, extraction, GC-NPD, organophosphorus pesticide |
| Citation: Wang, L. G., Jiang, X., Mao, Y. M., Zhao, Z. H. and Bian, Y. R. 2005. Organophosphorus pesticide extraction and cleanup from soils and measurement using GC-NPD. Pedosphere. 15(3): 386-394. |
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