Table 3 Major ions observed by positive ESI-MS of amide and amide-ester peaks and the major fragments detected by LC-MS-MS of these two compounds
From: Environmentally evaluated HPLC-ELSD method to monitor enzymatic synthesis of a non-ionic surfactant
Compound | m/z | Major fragments |
|---|---|---|
Amide (M = C 19 H 39 NO 6 ) | 377 | |
[M + H]+ | 378 | 360, 196, 78 |
[M + Na]+ | 400 | 382 |
[M + H–H20]+ | 360 | 178, 164 |
Amide-ester (M = C 31 H 61 NO 7 ) | 559 | |
[M + H]+ | 560 | 360, 542, 178 |
[M + Na]+ | 582 | |
[M + H–H20]+ | 542 | 360 |
[2 M + Na]+ | 1141 | 582 |