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Environmental fate & pathways

Adsorption / desorption

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Reference
Endpoint:
adsorption / desorption: screening
Type of information:
experimental study
Remarks:
read-across on structural analogue
Adequacy of study:
key study
Study period:
From 2009, December 08 to 2009, December 09
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP with certificate.The study is clear and complete in any parts. The substance is well identified, the method is suitable for the substance.
Qualifier:
according to
Guideline:
EU Method C.19 (Estimation of the Adsorption Coefficient (KOC) on Soil and Sewage Sludge Using High Performance Liquid Chromatography (HPLC))
Deviations:
no
Qualifier:
according to
Guideline:
OECD Guideline 121 (Estimation of the Adsorption Coefficient (Koc) on Soil and on Sewage Sludge using High Performance Liquid Chromatography (HPLC))
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
HPLC estimation method
Media:
soil/sewage sludge
Radiolabelling:
no
Test temperature:
22 +/- 0.5°C
Analytical monitoring:
no
Type:
log Koc
Remarks:
Peack 1
Value:
ca. 2.7
Temp.:
22 °C
Type:
log Koc
Remarks:
Peack 2
Value:
> 5.63
Temp.:
22 °C
Type:
log Koc
Remarks:
Peack 3
Value:
> 5.63
Temp.:
22 °C
Type:
log Koc
Remarks:
Peack 4
Value:
> 5.63
Temp.:
22 °C
Type:
log Koc
Remarks:
Peack 5
Value:
> 5.63
Temp.:
22 °C
Type:
log Koc
Remarks:
Peack 6
Value:
> 5.63
Temp.:
22 °C

Validity criteria are fulfilled:

Temperature during measurement did not vary by more than +/- 1°C

The value of log Koc derived from repeated measurements made under identical conditions and using the same set of reference substances did fall within a range of +/- 0.25 log units

Validity criteria fulfilled:
yes
Conclusions:
Results consist of 6 peacks, the first with log Koc of 2.7 and the other 5 with log koc > 5.63
Executive summary:

The adsorbtion/desorbtion behaviour of Fatty acids, C16-C18 and C18 unsaturated, methyl esters on soil and sewage sludge was evaluated in a study performed in accordance with OECD testing guideline 121 and GLP requirements

Description of key information

log Koc > 5.63 at 22°C

Key value for chemical safety assessment

Koc at 20 °C:
5.63

Additional information