Table 1.

Data of betalains quantification.

Betalains Compounds	R2	LOD (nmol/L)	LOQ (nmol/L)	Recovery (%)	RSD (%)
Betanin	0.999	2.00	6.00	84	2.3
Isobetanin	0.999	2.00	6.00	83	2.8
Betanidin	0.999	5.74	17.22	82	1.8
Isobetanidin	0.999	3.32	9.95	89	3.7
Neobetanin	0.999	4.56	13.67	91	4.7
17-Decarboxy-betanin	0.999	5.15	15.44	91	4.9
17-Decarboxy-isobetanin	0.999	2.26	6.77	86	2.0
2-Decarboxy-neobetanin	0.999	5.36	16.09	83	1.3

Abbreviations: R²—coefficients of determination; LOD—limit of detection; LOQ—limit of quantification; RSD—related standard deviation.