Chemical Underpinning of the Tea Bag Index: An Examination of the Decomposition of Tea Leaves

Table 2

CPMAS NMR integrals of green and rooibos tea preincubation (mean ± standard deviation (n = 2)).

Chemical shift region	Mean integral
	Green		Rooibos
	0 d	91 d	0 d	91 d
Alkyl C	0.230 ± 0.032b	0.405 ± 0.007a	0.152 ± 0.044b	0.237 ± 0.019b
O-Alkyl C	0.570 ± 0.003b	0.415 ± 0.030c	0.714 ± 0.018a	0.597 ± 0.031b
Aromatic C	0.146 ± 0.020a	0.108 ± 0.007a	0.102 ± 0.017a	0.123 ± 0.002a
Carbonyl C	0.054 ± 0.009a	0.072 ± 0.016a	0.032 ± 0.009a	0.044 ± 0.009a

Values within rows that share a letter are not significantly different according to ANOVA ().