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A. Pérez-Gálvez and J. Fontecha
Table 7.2
Product ions observed in the analysis by tandem MS-APCI source of representative carotenoids of phytoplankton biomass
Carotenoid
λ maxima (nm) in
ethanol a
Elemental
composition
Molecular weight a
[M
+ H] +
Product ions grouped by fragmentation process b, c
In-chain
Polyene chain
and terminal
group
Decyclization
Astaxanthin
478
C
40 H
52 O
4
597.3938
505.3312
579.3830
561.3730
- a
Canthaxanthin
474
C
40 H
52 O
2
565.4040
473.3414
–
α-Carotene
423, 444, 473
C
40 H
56
537.4455
445.3829
413.3200
481.3830
β-Carotene
450, 478
C
40 H
56
537.4455
445.3829
413.3200
481.3830
γ-Carotene
440, 460, 489
C
40 H
56
537.4455
445.3829
467.3670
–
β-Cryptoxanthin
428, 450, 478
C
40 H
56 O
553.4404
461.3780
535.4300
495.3990
5,8-epoxy-Diadinoxanthin
447, 476
C
40 H
54 O
3
583.4157
491.3531
565.4040
221.1540
–
Diatoxanthin
425, 449, 475
C
40 H
54 O
2
567.4197
475.3571
549.4090
551.4250
533.4140
Fucoxanthin
426, 449, 475
C
42 H
58 O
6
659.4306
567.3680
641.4200
623.4090
599.4090
581.3990
221.1540
–
Lutein
442, 445
C
40 H
56 O
2
569.4353
477.3571
551.4250
533.4140
429.3150
–
Lycopene
C
40 H
56
537.4455
467.3670
445.3829
413.3200
- b
(continued)