EPA Method 614.1

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EPA Method 614.1:
The Determination of Organophosphorus Pesticides in Municipal and Industrial Wastewater

Organophosphorus pesticides are removed from the sample matrix by extraction with 15% methylene chloride in hexane. The extract is dried, exchanged into hexane, and analyzed by gas chromatography. Column chromatography is used as necessary to eliminate interferences which may be encountered. Measurement of the pesticides is accomplished with a nitrogen/phosphorus-specific detector.

This method covers the determination of certain organophosphorus pesticides in municipal and industrial wastewater.