Improved method for partition of organophosphate pesticide residues on a solid phase partition column.
A specially modified form of diatomaceous earth was used to develop a solid phase partition column which, with methylene chloride, is used to extract organophosphate pesticides from an aqueous acetone filtrate. This column has proven to be a direct replacement for the time consuming and labor intensive separatory funnel partition of the Luke procedure. Recoveries from the column are quantitative and reproducible for industrial phosphates and a wide range of polar and nonpolar organophosphate pesticides. The column is reusable and convenient and results in a 35-45% savings in time over separatory funnel partition. Neither sulfate columns nor separatory funnels are required, and no emulsions are formed.
Food and Drug Administration, Total Diet Research Center, Kansas City, MO 64106.
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D000821:Animal Feed / Q000032:analysis; D002849:Chromatography, Gas; D005506:Food Contamination / Q000032:analysis; D007306:Insecticides / Q000032:analysis*; D009943:Organophosphorus Compounds; D010573:Pesticide Residues / Q000032:analysis*; D012997:Solvents
D007306:Insecticides; D009943:Organophosphorus Compounds; D010573:Pesticide Residues; D012997:Solvents