. 2019 Oct 21;8(10):499. doi: 10.3390/antiox8100499

Table 1.

Quantification per classes/sub-classes of phenolic compounds identified from UHPLC-QTOF-MS data for the different rooibos tea samples.

Matrix	Cyanidin Eq.	Luteolin Eq.	Catechin Eq.	Matairesinol Eq.	Tyrosol Eq.	Ferulic Acid Eq.	Resveratrol Eq.	Total
*Red Rooibos*
Cold brew	12.4 ± 3.3^a	75.4 ± 7.1^a	36.2 ± 8.9^a	11.8 ± 3.5	157.8 ± 10.7^a	65.6 ± 7.2^a	1.7 ± 0.6^a	360.9 ± 25.5^a
Boiled brew	21.0 ± 5.3^b	110.9 ± 14.4^c	43.9 ± 11.0^b	12.0 ± 2.0	189.5 ± 20.9^b	91.9 ± 5.4^b	2.4 ± 0.7^b	471.6 ± 33.5^c
Regular brew	15.5 ± 3.1^a	94.0 ± 14.9^b	37.7 ± 11.2^a	12.1 ± 2.4	161.1 ± 12.8^a	63.8 ± 6.0^a	1.7 ± 0.2^a	385.9 ± 26.9^b
Significance	***	***	***	ns	***	***	*	***
*Green Rooibos*
Cold brew	42.3 ± 7.4	182.9 ± 10.9^a	79.7 ± 14.8^ab	13.4 ± 3.8^a	217.5 ± 40.0^ab	84.5 ± 8.0^b	8.2 ± 1.2	628.5 ± 39.0^b
Boiled brew	44.5 ± 9.2	200.4 ± 20.0^b	83.9 ± 16.8^b	17.8 ± 2.6^b	250.7 ± 19.7^b	108.1 ± 13.9^c	9.0 ± 0.9	714.4 ± 42.0^c
Regular brew	42.6 ± 9.9	187.1 ± 15.1^a	77.1 ± 15.2^a	12.3 ± 2.1^a	203.9 ± 20.7^a	66.5 ± 11.7^a	8.1 ± 1.0	597.6 ± 48.6^a
Significance	ns	*	*	**	*	***	ns	***

Results are expressed as mean values (mg phenolic equivalents/L) ± standard deviation (n = 12). Superscript letters within each column (considering green and red rooibos, separately) indicate homogeneous sub-classes as resulted from ANOVA (p < 0.05; Duncan’s post-hoc test). ns = not significant; *** = p < 0.001; ** = p < 0.01; * = p < 0.05. Eq. = Equivalents.