title: Simultaneous analysis of 25 pesticides in crops using gas chromatography and their identification by gas chromatography-mass spectrometry.
abstract: The simultaneous analysis of 25 pesticides in soy beans and rices was performed by gas chromatography with dual electron-capture detection and nitrogen-phosphorus detection. The pesticides were extracted from the samples with solvent and the Bio-Beads S-X3 clean-up procedure was used. Recovery studies were performed at the 1-ppm level of pesticides added to each crop. Their recoveries ranged between 83 and 105% with coefficient of variations of 0.5-8.2%. The gas chromatographic properties of the 25 pesticides were also investigated. Conformation analysis was achieved by the retention time and characteristic fragment ions using the technique of gas chromatography-mass spectrometry-selected-ion monitoring.
authors.affiliation: Advanced Analysis Center, Korea Institute of Science and Technology, Seoul.
authors.forename: J
authors.initials: J
authors.lastname: Hong
authors.forename: Y
authors.initials: Y
authors.lastname: Eo
authors.forename: J
authors.initials: J
authors.lastname: Rhee
authors.forename: T
authors.initials: T
authors.lastname: Kim
authors.forename: K
authors.initials: K
authors.lastname: Kim
mesh_terms: D002849:Chromatography, Gas / Q000379:methods*; D004583:Electrons; D005506:Food Contamination; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D009584:Nitrogen; D012275:Oryza / Q000737:chemistry; D010575:Pesticides / Q000032:analysis*; D010758:Phosphorus; D013025:Glycine max / Q000737:chemistry
chemical_list: D010575:Pesticides; D010758:Phosphorus; D009584:Nitrogen