Table 3 Chromatographic and mass characteristics of carotenoids obtained from crude carotenoid fraction (CC fraction) by HPLC-MS/MS.
From: Carotenoids from UV-resistant Antarctic Microbacterium sp. LEMMJ01
Peak no. | Rt (min) | Measured (m/z) | Molecular formula | Theorical (m/z) | Fragment ions (m/z) | Proposed compound |
|---|---|---|---|---|---|---|
1 | 3.93 | 537.4860 | C40H56 | 537.4460 | 123,137,177,413 | alpha-carotene |
2 | 4.53 | 551.5047 | C40H54O | 551.4252 | 133,203,255,495,536 | echinenone |
3 | 5.32 | 565.5186 | C40H52O2 | 565.4045 | 547,363,203 | canthaxanthin |
4 | 6.26 | 579.5359 | C40H52O4 | 596.3865 | 285,379,561 | astaxanthin[M + H- 18]+ |
