TABLE 3.
Efficiency of established extraction methods in liberating adsorbed fluorophores from two types of sedimentsa
| Sediment sample | % MUF desorbed
|
% MCA desorbed
|
|||
|---|---|---|---|---|---|
| With 90 mM NaOH | With 80% ethanol | Supernatant without extraction | With 20% (vol/vol) acetone | Supernatant without extraction | |
| Sapropel S3 M40/4-66-4SL | 34.1 ± 1.5 | 54.2 ± 5.7 | 5.7 ± 0.1 | 16.1 ± 0.4 | 3.8 ± 0.5 |
| Dangast | 100.9 ± 1.9 | 64.2 ± 1.9 | 36.7 ± 2.1 | 82.6 ± 0.5 | 7.9 ± 0.4 |
a
The fluorescence measured in the supernatants of the different treatments was corrected for the autofluorescence of sediment compounds liberated during incubation.