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Table 2 Identification and Characterization of major Rhamnolipids compounds using LC-ESI-MS (Both in negative and positive mode).

From: Simultaneous polyhydroxyalkanoates and rhamnolipids production by Thermus thermophilus HB8

Substance [M+H]+ m/z [M+Na]+ m/z [M+K]+ m/z [M-H+Na2]+ m/z [M-H]- m/z
Mono-rhamno-mono-lipidic congeners
[Rha-C8:2] 303   341   301
[Rha-C8:1] 305     
[Rha-C10:2] 331     
[Rha-C10:1] 333     331
[Rha-C10] 335     
[Rha-C12:2] 359 381    
Octyl phathalate   413    
Mono-rhamno-di-lipidic congeners
[Rha-(C8-C8:1)] or [Rha-(C8:1-C8)] 447   485 491 445
[Rha-(C8-C8)] 449 471 487 493 447
[Rha-(C10-C8)] or [Rha-(C8-C10)] 477 499 515 521 475
[Rha-(C8-C10:1)] or [Rha-(C8:1-C10)] 475     473
[Rha-(C10-C10:1)] or [Rha-(C10:1-C10)] 503 525 541 547 501
[Rha-(C10-C10)] 505   543   503
[Rha-(C10-C10:1)-CH3] or [Rha-(C10:1-C10)-CH3] 517     
[Rha-(C10-C12:1)] or [Rha-(C10:1-C12)] 531 553 569 575 529
[Rha-(C10-C12)] or [Rha-(C12-C10)] 533 555 571 577 531
[Rha-(C12-C14:1)] or [Rha-(C14-C12:1)] 587   625 631 585
[Rha-(C14-C14)] 617    661  
[Rha-(C14-C14:1)] or [Rha-(C14:1-C14)] 615     613
[Rha-(C14-C16)] or [Rha-(C16-C14)] 645     643
[Rha-(C14-C16:1)] or [Rha-(C14-C16:1)] 643     641
[Rha-(C16-C16)] 673     671
Di-rhamno-mono-lipidic congeners
[Rha-Rha-C8)] 453     451
[Rha-Rha-C10:1)] 479     477
[Rha-Rha-C10)] 481     479
[Rha-Rha-C12:1)] 507     505
[Rha-Rha-C12)] 509     507
Di-rhamno-di-lipidic congeners
[Rha-Rha-(C8-C8)] 595 617 633   593
[Rha-Rha-(C8-C10:1)] or [Rha-Rha-(C8:1-C10)] [Rha-Rha-(C10-C8:1)] or [Rha-Rha-(C10:1-C8)] 621   659 665 619
[Rha-Rha-(C10-C8)] or [Rha-Rha-(C8-C10)] 623 645 661 667 621
[Rha-Rha-(C10-C10)] 651 673 689 695 649
[Rha-Rha-(C10-C10:1)] or [Rha-Rha-(C10:1-C10)]
[Rha-Rha-(C8-C12:1)] or [Rha-Rha-(C8:1-C12)]
649 671 687 693 647
[Rha-Rha-(C10-C10:1)-CH3] or [Rha-Rha-(C10:1-C10)-CH3] 663     
[Rha-Rha-(C10-C12:1)] or [Rha-Rha-(C10:1-C12)] [Rha-Rha-(C12:1-C10)] or [Rha-Rha-(C12-C10:1)] 677 699 715 721 675
[Rha-Rha-(C10-C12)] or [Rha-Rha-(C12-C10)] 679 701 717 723 677
[Rha-Rha-(C12-C12:1)] or [Rha-Rha-(C12:1-C12)] 705 727 743 749 703
[Rha-Rha-(C12-C12:2)] or [Rha-Rha-(C12:2-C12)] 703 725 741 747 701
[Rha-Rha-(C12-C12)] 707 729   751 705
[Rha-Rha-(C12-C14:1)] or [Rha-Rha-(C14:1-C12)] [Rha-Rha-(C14-C12:1)] or [Rha-Rha-(C12:1-C14)] 733    777 731
[Rha-Rha-(C14-C14:1)] or [Rha-Rha-(C14:1-C14)] 762 784   806 760
[Rha-Rha-(C16-C14)] or [Rha-Rha-(C14-C16)] 792 814    790
  1. Data shown in bold represent major components of the corresponding Rhamnolipid mixture