Table 2.
The chemical composition of rhamnolipid mixture produced by P. aeruginosa P-1 culture identified by LC-ESI-MS
| Rhamnolipid congener | Molecular formula | Molecular weight [g mol−1] | Pseudomolecular ion (m/z) | Ion fragments m/z | Retention time [min] | Relative abundance [%] |
|---|---|---|---|---|---|---|
| Rha-C8:2 | C14H22O7 | 302 | 301 | – | 9.2 | 0.8 |
| Rha-C8-C10/ Rha-C10-C8 * | C24H44O9 | 476 | 475 | 311; 169 | 18.5 | 14.1 |
| Rha- C10-C10 | C24H48O9 | 504 | 503 | 339; 333; 169;163;119;103 | 12.1 | 6.8 |
| Rha-C10-C12:1/ Rha-C12:1-C10 | C28H50O9 | 530 | 529 | 365; 333; 169; 163;119;103 | 16.1 | 10.9 |
| Rha-Rha-C8-C10 | C30H54O13 | 622 | 621 | 452; 311;169 | 16.9 | 21.3 |
| Rha-Rha-C10-C10 | C32H58O13 | 650 | 649 | 479; 339; 311; 246; 169 | 11.5 | 15.7 |
| Rha-Rha-C10-C12:1 | C34H60O13 | 676 | 675 | 479; 311; 195; 169; 119; 103 | 10.4 | 5.6 |
| Rha-Rha-C10-C12/ Rha-Rha-C12-C10 | C34H62O13 | 678 | 677 | 507; 479; 311; 205;197; 169 | 15.2 | 24.8 |
Negative ESI-MS, [M-H]− = pseudomolecular ions