Rapid gas chromatographic method for the multiresidue screening of fruits and vegetables for organochlorine and organophosphate pesticides.
A rapid and reliable method was developed for the determination of pesticides in fruits and vegetables. A 100 g sample is extracted with a mixture of 200 mL petroleum ether and 100 mL 2-propanol. The extract is backwashed 4 times, twice with aqueous sodium sulfate and twice with 350 mL distilled water, and then dried over 15 g sodium sulfate. The dried extract is analyzed by capillary gas chromatography with selective organochlorine and organophosphorus detection. The method determines primarily nonpolar pesticides, with recoveries ranging from 81 to 114%, and has an average limit of detection of 10 ppb for both detectors.
Pylypiw
H M
HM
Connecticut Agricultural Experiment Station, Department of Analytical Chemistry, New Haven 06504-1106.
D002849:Chromatography, Gas / Q000379:methods*; D005506:Food Contamination / Q000032:analysis*; D005638:Fruit / Q000737:chemistry*; D006843:Hydrocarbons, Chlorinated; D007306:Insecticides / Q000032:analysis*; D009943:Organophosphorus Compounds; D010573:Pesticide Residues / Q000032:analysis*; D013997:Time Factors; D014675:Vegetables / Q000737:chemistry*
D006843:Hydrocarbons, Chlorinated; D007306:Insecticides; D009943:Organophosphorus Compounds; D010573:Pesticide Residues