Table 5.
Effect of NaCl on the micellar size distribution of the crude rhamnolipid mixture and the mono-rhamnolipid and di-rhamnolipid congeners determined by DLS analysis. The concentrations of the crude rhamnolipid mixture, mono-rhamnolipids and di-rhamnolipids were 1.5, 1.0 and 0.5 g/L, respectively. The results represent the average of 10 measurements ± standard deviation. ND: not determined.
| [NaCl] (mM) | Size (nm) | PDI | |
|---|---|---|---|
| Crude RL mixture | 0 | 302.8 ± 7.4 | 0.549 ± 0.009 |
| 375 | 456.6 ± 42.2 | 0.596 ± 0.106 | |
| 875 | 2343 ± 154.1 | 0.753 ± 0.190 | |
| Mono-RL | 0 | 140.3 ± 2.0 | 0.263 ± 0.006 |
| 375 | 2212 ± 444.1 | 0.890 ± 0.107 | |
| 875 | 4674 ± 359.8 | 1.000 ± 0.000 | |
| Di-RL | 0 | 133.1 ± 4.9 | 0.373 ± 0.042 |
| 375 | > 10000 | ND | |
| 875 | > 10000 | ND |