EPA Method 835.1230

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EPA Method 835.1230:
Adsorption/Desorption (Batch Equilibrium)

Adsorption/desorption studies are used to estimate the adsorption/desorption behavior of a substance on soils. The goal is to obtain a sorption value which can be used to predict partitioning under a variety of environmental conditions; to this end, equilibrium adsorption coefficients for a chemical on various soils are determined as a function of soil characteristics (e.g., organic carbon content, clay content, soil texture, and pH). Different soil types have to be used in order to cover as widely as possible the interactions of a given substance with naturally occurring soils.

This guideline is intended for use in meeting testing requirements of the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) (7 U.S.C.136, et seq.) and for testing pursuant to the Toxic Substances Control Act (TSCA) (15 U.S.C. 2601, et seq.)