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  • Title: Improved method for partition of organophosphate pesticide residues on a solid phase partition column.
    Author: Hopper ML.
    Journal: J Assoc Off Anal Chem; 1988; 71(4):731-4. PubMed ID: 3417590.
    Abstract:
    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.
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