TABLE 1.

Betalainic profile in red (R), orange (O), and yellow (Y) prickly pear flesh and peel extracts (FEs and PEs, respectively) by LC-DAD-ESI-MS/MS analysis. Results are expressed as mean ± standard deviations of ten independent experiments (n = 3).

Peak, n.	Compound	Rt (min)	λmax(nm)	MS (m/z)[M + H]+	MS/MS (m/z)[M + H]+		FE			PE
								g IEa/100 g DE§
Betaxanthins						R	O	Y	R	O	Y
1	Muscaaurin VII	15.78	477	349	305	0.77 ± 0.10	1.16 ± 0.17	1.01 ± 0.04	1.47 ± 0.40	2.25 ± 0.79	1.12 ± 0.17
2	Vulgaxanthin I	19.25	475	340	323	1.52 ± 0.18	2.63 ± 0.09	1.56 ± 0.29	2.49 ± 0.35	3.96 ± 0.17	1.46 ± 0.19
3	γ-aminobutyric acid-Bx	23.62	467	297	253	0.23 ± 0.06	0.82 ± 0.19	0.81 ± 0.07	1.01 ± 0.27	1.10 ± 0.09	0.79 ± 0.02
4	Indicaxanthin	24.47	486	309	265	37.60 ± 4.18	98.01 ± 9.55	78.27 ± 5.77	22.27 ± 4.50	70.46 ± 9.96	50.18 ± 6.12
5	Methionine-Bx	27.95	477	343	299	0.37 ± 0.07	0.49 ± 0.07	0.63 ± 0.05	1.42 ± 0.25	0.47 ± 0.09	0.66 ± 0.10
Betacyanins						g BE°/100 g DE§
6	Betanin	25.88	538	551	389	18.94 ± 1.36	1.20 ± 0.04	1.16 ± 0.17	27.30 ± 5.85	2.45 ± 0.13	1.54 ± 0.08
7	Isobetanin	26.11	538	551	389	0.80 ± 0.12	0.08 ± 0.01	0.05 ± 0.01	1.67 ± 0.23	0.18 ± 0.04	0.09 ± 0.02
8	Gompherenin I	26.82	540	551	389	0.24 ± 0.04	n.d.	n.d.	0.74 ± 0.16	0.03 ± 0.00	0.04 ± 0.01
9	Betanidin	28.22	540	389	345	0.05 ± 0.01	n.d.	n.d.	0.21 ± 0.06	0.02 ± 0.00	0.01 ± 0.00

^aIE, indicaxanthin equivalents; ^§DE, dry extract; ^°BE, betanin equivalents.