Separation of chlorinated hydrocarbons and organophosphorus, pyrethroid pesticides by silicagel fractionation chromatography and their simultaneous determination by GC-MS

Article type: Research Article

Authors: WANG, Li-gang | JIANG, Xin | WANG, Fang | BIAN, Yong-rong | Forster, Stephan | Martens, Dieter

Affiliations: Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China | Institute of Ecological Chemistry, National Research Center for Environment and Health, Neuherberg 85764, Germany

Note: [] Corresponding author. E-mail: jiangxin@issas.ac.cn

Abstract: A silicagel fractionation procedure for environmental sample extracts, which separates chlorinated hydrocarbons (CHCs) and organophosphorus, pyrethroid pesticides into two groups for subsequent instrumental analysis, was developed in this study. This method was achieved by optimizing the fraction cut-off volume of elution and different solvents. Using fully activated silica gel and cut-off CHCs collection after 10 mi 10% dichloromethane (DCM) in n-hexane passing through the column resulted in satisfactory separation of CHCs and organophosphorus, pyrethroid pesticides. This procedure had a higher reliability for CHCs than for organophosphorus, pyrethroid pesticides, because there is a relatively reliable recovery for CHCs. This approach is less expensive due to reducing sample pre-treatment time and solvent consumption.

Keywords: CHCs, organophosphorus pesticides, pyrethroid pesticides, silicagel fractionation

Journal: Journal of Environmental Sciences, vol. 16, no. 2, pp. 268-271, 2004