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Environmental fate studies

Professionals working in the Environmental Fate department in ESSEM Compliance Solutions Private Limited have an extensive experience in the field. Environmental Fate studies provide information about the behavior of the test chemical undergoing biodegradation in nature. The studies are conducted in accordance with the OECD TG and Standard Operating Procedure. Series of standard methods have been established for biodegradability test including OECD 209, OECD 301 and OECD 302.

OECD 121 - Estimation of the Adsorption Coefficient on Soil and Sewage Sludge

This Test Guideline describes an experimental method using HPLC for the estimation of the adsorption coefficient (Koc) in soil and in sewage sludge. The adsorption coefficient is defined as the ratio between the concentration of the substance in the soil/sludge and the concentration of the substance in the aqueous phase at adsorption equilibrium. The test item is injected in the column packed with cyanopropyl solid phase containing lipophilic and polar moieties. As a result of partitioning between mobile and stationary phases the test item is retarded. The retention time is determined in duplicate.

OECD 209 - Activated Sludge, Respiration Inhibition Test (Carbon and Ammonium Oxidation)

OECD 301 D - Closed Bottle Test

OECD 302 B - Inherent Biodegradability: Zahn - Wellens/EMPA Test

OECD 305 - Bioaccumulation in Fish: Aqueous and Dietary Exposure

OECD 309 - Aerobic Mineralisation in Surface Water - Simulation Biodegradation Test