title: Simultaneous determination of organophosphorus and organonitrogen pesticides residues in Angelica sinensis.
abstract: Gas chromatography with nitrogen phosphorus detector (GC-NPD) was applied to the simultaneous determination of 15 organophosphorus and 6 organonitrogen pesticides residues in Angelica sinensis. The pesticides were extracted by microwave-assisted extraction (MAE) and ultrasound-assisted extraction (UAE) techniques, respectively. The experimental variables were optimized through orthogonal array experimental design. Cleanup of extracts was performed with column chromatography using florisil and neutral aluminum as the sorbents. The determination of pesticides in the final extracts was carried out by GC-NPD. Under optimized conditions, the average recoveries obtained from MAE and UAE are in the range of 75.1-129% and 70.6-129%, respectively, and the relative standard deviations of MAE and UAE were 3.1-10.6% and 1.0-17.8%, respectively.
authors.affiliation: State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China. yqwanoy@sina.com
authors.forename: Yi Q
authors.initials: YQ
authors.lastname: Wan
authors.forename: Xue J
authors.initials: XJ
authors.lastname: Mao
authors.forename: Ai P
authors.initials: AP
authors.lastname: Yan
mesh_terms: D029971:Angelica sinensis / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry; D008872:Microwaves; D017672:Nitrogen Compounds / Q000032:analysis*; D009943:Organophosphorus Compounds / Q000032:analysis*; D010573:Pesticide Residues / Q000032:analysis*; D012015:Reference Standards; D015203:Reproducibility of Results; D014465:Ultrasonics
chemical_list: D017672:Nitrogen Compounds; D009943:Organophosphorus Compounds; D010573:Pesticide Residues