Determination of organophosphorus pesticide residues in the roots of Platycodon grandiflorum by solid-phase extraction and gas chromatography with flame photometric detection.
A simple and rapid sample preparation method using accelerated solvent extraction and solid-phase extraction (SPE) cleanup for determining organophosphorus (OP) pesticides in the roots of Platycodon grandiflorum was developed. The OP pesticides were concentrated by use of an SPE cartridge (ENVI-Carb) and quantitatively analyzed and confirmed by capillary gas chromatography with flame photometric detection. The pesticides were eluted from the cartridges with 20 mL acetonitrile-toluene (3 + 1, v/v). The average recovery from 10 g PF grandiflorum roots, fortified at 3 levels ranging from 0.04 to 1.00 mg/kg, was 91.9% with a relative standard deviation of 4.3%. The limits of detection ranged from 1.16 x 10(-3) mg/kg (dimethoate) to 4.64 x 10(-3) mg/kg (dichlorvos). The proposed method showed acceptable accuracy and precision while minimizing environmental concerns, time, and labor.
Yi
Xionghai
X
Institution of Agricultural Ecological and Environmental Toxicology, College of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, People's Republic of China.
Hua
Qing
Q
Lu
Yitong
Y
D000097:Acetonitriles / Q000032:analysis; D002849:Chromatography, Gas / Q000379:methods*; D004006:Dichlorvos / Q000032:analysis; D004117:Dimethoate / Q000032:analysis; D004777:Environment; D009943:Organophosphorus Compounds / Q000032:analysis*; D009946:Organothiophosphorus Compounds / Q000032:analysis; D010573:Pesticide Residues / Q000032:analysis; D010575:Pesticides / Q000032:analysis*; D018517:Plant Roots / Q000378:metabolism*; D031238:Platycodon / Q000378:metabolism*; D015203:Reproducibility of Results; D014050:Toluene / Q000032:analysis
D000097:Acetonitriles; D009943:Organophosphorus Compounds; D009946:Organothiophosphorus Compounds; D010573:Pesticide Residues; D010575:Pesticides; D014050:Toluene; D004006:Dichlorvos; D004117:Dimethoate; C032159:acetonitrile