Environmental Chemistry Methods (ECM)
Environmental chemistry methods for soil and water are used to determine the fate of pesticides in the environment. The methods identify and quantify the pesticide residue of interest, determining the total concentration of pesticides, including the extractable parent compound and significant metabolites and degradates (break-down products).
Reliable analytical methods are necessary for studies of exposure, environmental fate, and ecological effects. Although the Agency reviews all analytical methods submitted in support of pesticide registration, only about 25% of the currently available environmental chemistry methods have been evaluated in EPA's laboratory. While most of the methods perform satisfactorily, some have deficiencies, particularly some of the older methods. EPA makes no claim of validity by posting these methods, but recognizes that the methods may be of some utility to state, tribal, and local authorities. Questions about any of these methods should be discussed with EPA's laboratory staff.
Work on environmental chemistry methods is conducted by the Environmental Chemistry Laboratory, under the Office of Pesticide Programs, in Bay St. Louis, Mississippi.