OECD106

Adsorption/Desorption

Study description if available:

This Test Guideline is aimed at estimating the adsorption/desorption behaviour of a chemical on different soil types. 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 (organic carbon, clay content, soil texture, and pH). The test comprises three tiers. The tier 1 is the preliminary study, the tier 2 is the screening test (in 5 soils) and the tier 3 is the determination of Freundlich adsorption isotherms or the study of desorption by means of desorption kinetics/Freundlich desorption isotherms, as appropriate. Two methods are possible for analyse: the indirect method and the direct method. The indirect method consists of the adjunction of the test substance to soil samples, the agitation of the mixture for an appropriate time, the analysis of the aqueous phase after centrifugation and the filtration of the soil suspension. The amount of test substance adsorbed on the soil sample is calculated as the difference between the amount of test substance initially present in solution and the amount remaining at the end of the experiment. The direct method is recommended when the difference in the solution concentration of the substance cannot be accurately determined.

Tips: search our services here by using keywords, species, guideline number or endpoint.
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
You can also filter by sector using the buttons below.
SANTE 2020/12830 Rev.1.
Read more & request a quote
ISO14669
Crustacean Acute: Toxicity Study - Acartia Tonsa or Tisbe battaglia. Determination of acute lethal toxicity to marine copepods.
Read more & request a quote
Arenicola marina sediment study
Read more & request a quote
Corophium volutator acute toxicity
Read more & request a quote
Corophium volutator chronic study
Read more & request a quote
OPPTS/OCSPP850.1035
Mysid Acute (Static and Flow Through)
Read more & request a quote
OPPTS/OCSPP850.1055
ISO17244
Oyster Embryo Larval Development Test
Read more & request a quote
OPPTS/OCSPP850.135
Mysid Chronic Toxicity Test
Read more & request a quote
OPPTS/OCSPP850.14
Fish Chronic: Saltwater - Toxicity Study
Read more & request a quote
OPPTS/OCSPP850.45
ISO10253
Algal Acute Marine - Analytical Chemistry
Read more & request a quote
OPPTS/OCSPP850.45
ISO10253
Algal Acute Marine - Growth Inhibition Study
Read more & request a quote
OECD Draft
Soil Photolysis
Read more & request a quote
OECD102
Melting Point/Melting Range
Read more & request a quote
OECD103
Boiling Point
Read more & request a quote
OECD104
Vapour/Pressure (isoteniscope)
Read more & request a quote
OECD105
EC A.6
Water Solubility
Read more & request a quote
OECD106
Adsorption/Desorption
Read more & request a quote
OECD107
OPPTS/OCSPP830.755
EC A.8
Partition Coefficient
Read more & request a quote
OECD109
EC A.3
Relative Density
Read more & request a quote