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.
Hopper
M L
ML
Food and Drug Administration, Total Diet Research Center, Kansas City, MO 64106.
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