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EC number: 700-902-0
CAS number: 1370699-98-1
5.4.1/1: Capacity Factors (k') of the Reference Items for Soil and
= Retention time 1. Injection; tR2 = Retention time 2. Injection
= Capacity factor; Koc = Adsorption coefficient
used for determination of tR for sewage sludge
5.4.1/2: Calibration Data of the Reference Items for Soil and Sewage
: Correlation Coefficient; r2: Coefficient of determination
5.4.1/3: Retention Times, Capacity Factors (k') and Adsorption
Coefficient (Koc) of Test item for Soil and Sewage sludge
log Koc soil with 95% CI
Soil - Peak 1
2.0 ± 0.1
1.6 to 2.4
Soil - Peak 2
2.3 ± 0.1
2.0 to 2.7
Sewage sludge - Peak 1
2.0 ± 0.2
1.5 to 2.5
Sewage sludge - Peak 2
2.5 ± 0.2
2.0 to 2.9
= Retention time
= Confidence Interval
validity criteria were fulfilled:
signal-to-noise ratio > 3 was provided for NaNO3, reference and the test
value of logKocderived from repeated measurements made under identical
conditions and using the same set of reference items fell within a range
of ± 0.25 log units.
column temperature during the measurement was kept in the range of 20-25
± 1 °C and did not differ more than ± 1 °C.
adsorption coefficient (log Koc) for the test item on soil and on sewage
sludge using high performance liquid chromatography (HPLC) was estimated
according to OECD 121 guideline with GLP compliance.
test was performed temperature controlled, (23.6 °C, mean value) with a
mobile phase consisting of 55 % methanol and 45 % HPLC water. A 110 mg/L
sample of the test item was analyzed threefold via HPLC on a cyanopropyl
(CN-) column with DAD-detection.
were performed using seven reference items for soil and six for sewage
sludge with known log Koc values (given by the guidelines). The
reference items were measured twice, once before and once after the
measurement (double injection of one replicate) of the test item. Dead
time of the HPLC- system was determined with sodium nitrate.
each peak two individual log Koc values for soil and for sewage sludge
for the test item were derived under consideration of the first and
second calibration. Finally a mean value for soil and for sewage sludge
was calculated from these individual log Koc values. Based on these data
a log Koc of 2.0 for the first peak and 2.3 for the second peak for soil
and a log Koc 2.0 for the first peak and 2.5 for the second peak for
sewage sludge were determined for test item.
adsorption coefficient log Koc of the test item was determined to be 2.0
for the first peak and 2.3 for the second peak in soil and 2.0 for the
first peak and 2.5 for the second peak in sewage sludge.
OECD Guideline 121, EU Method C.19,
GLP, key study, validity 1:
log Koc = 2.0 and 2.3 for soil (Koc=100 and
log Koc= 2.0 and 2.5 for sewage sludge
(Koc=100 and 316)
The substance is considered moderately
mobile in soils and sewage sludge (according to the criteria developed
by P.J. McCall et al., 1981).
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