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. 2014 Apr 18;21(15):9385–9395. doi: 10.1007/s11356-014-2872-1

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