title: Assessment of herbicides and organochlorine pesticides contamination in agricultural soils using gas chromatography-mass spectrometry.
abstract: A rapid multi-residue method for the simultaneous analysis of 3 herbicides and 8 organochlorine pesticides (OCPs) in agricultural soils has been developed, using ultrasonic solvent extraction coupled with gas chromatography-mass spectrometry (GC-MS). The recoveries ranged from 81% to 117% with a relative standard deviation (R.S.D) lower than 15%. The limits of quantification (LOQs) ranged from 0.03 to 1.06 microg x kg(-1) dry weight for different pesticides studied. The proposed method has been applied to investigate the 11 pesticide residues in agricultural soils collected from Liaoning Province, northeast of China. 3 OCPs and 3 herbicides were identified. Acetochlor, atrazine, butachtor were measured in the relatively high level with values ranging from 0.53 to 203.18 microg x kg(-1), 0.14 to 21.20 microg x kg(-1), <0.05 to 30.87 microg x kg(-1), respectively. All the OCPs residue levels were below 10 microg x kg(-1). The concentration of the eleven pesticides in this study was compared with the date of other countries reported and the corresponding limiting values used in Netherland, USA, Canada, Vietnam and Thailand. Among the herbicide residues, there was a significant relativity between soil utilizing types and their residue concentration. It seems that the monitoring action for soil contamination caused by commonly-used herbicides should be enhanced according to soil utilizing types, especially acetochlor in maize field.
authors.affiliation: Inspection and Testing Center of Agro-product Safety and Environment Quality, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang CN-110016, China.
authors.forename: Wan-Hong
authors.initials: WH
authors.lastname: Wang
authors.forename: Shi-Cheng
authors.initials: SC
authors.lastname: Wang
authors.forename: Yan-Hong
authors.initials: YH
authors.lastname: Wang
mesh_terms: D000383:Agriculture; D002681:China; D004784:Environmental Monitoring / Q000379:methods; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D006540:Herbicides / Q000032:analysis*; D006843:Hydrocarbons, Chlorinated / Q000032:analysis; D010573:Pesticide Residues / Q000032:analysis; D010575:Pesticides / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis*
chemical_list: D006540:Herbicides; D006843:Hydrocarbons, Chlorinated; D010573:Pesticide Residues; D010575:Pesticides; D012989:Soil Pollutants