. 2021 Dec 25;11(1):47. doi: 10.3390/foods11010047

Table 4.

Phenolic acid profile of I. paraquariensis and various varieties of I. aquifolium.

Compound	RI Exp. ¹	RI Lit. ²	m/z	I. paraguariensis	I. aquifolium	I. aquifolium Alaska	I. aquifolium Ferox Argentea
Compound	RI Exp. ¹	RI Lit. ²	m/z	Concentration (mg/g) d.w.
Malic acid, 3TMS derivative	1502	1497	73/147/233	0.07 ± 0.02 ^3,4,a	0.55 ± 0.13 ^c	0.26 ± 0.09 ^b	0.26 ± 0.11 ^b
Citric acid, 4TMS derivative	1856	1845	273/73/147	0.16 ± 0.12 ^a	0.06 ± 0.02 ^c	0.11 ± 0.04 ^b	0.11 ± 0.05 ^b
Quininic acid, 5TMS derivative	1863	1851	373/374/377	0.01 ± 0.01 ^a	0.19 ± 0.07 ^b	0.22 ± 0.07 ^c	0.22 ± 0.11 ^c
Ferulic acid, 2TMS derivative	2102	2104	338/73/323	0.20 ± 0.08 ^a	0.11 ± 0.05 ^b	0.06 ± 0.02 ^c	0.06 ± 0.03 ^c
Caffeic acid, 3TMS derivative	2163	2155	396/219/73	2.43 ± 0.27 ^a	2.88 ± 0.43 ^c	1.68 ± 0.31 ^b	1.64 ± 0.24 ^b
3-O-Coumaroyl-D-quinic acid, 5TMS derivative	3043	3048	219/345/73	1.03 ± 0.09 ^a	0.07 ± 0.04 ^b	0.03 ± 0.02 ^c	0.04 ± 0.01 ^c
Chlorogenic acid, 6TMS derivative	3081	3092	345/73/255	1.08 ± 0.18 ^a	0.05 ± 0.02 ^b	0.03 ± 0.01 ^c	0.03 ± 0.01 ^c
4-O-Caffeoylquinic acid, 6TMS derivative	3096	3095	219/73/255	0.80 ± 0.13 ^a	0.04 ± 0.03 ^b	0.02 ± 0.01 ^c	0.02 ± 0.01 ^c
TOTAL				5.76 ^a	3.93 ^b	2.40 ^c	2.38 ^c

¹ Experimental retention indices calculated against n-alkanes. ² Retention indices according to the NIST 20 database. ³ Values are mean ± SEM; values followed by the same letter within a row are not significantly different (p > 0.05, Duncan’s test). ⁴ Data are relative concentrations expressed per internal standard.