. Author manuscript; available in PMC: 2016 May 23.

Published in final edited form as: Botanics. 2015 Nov 30;5:65–76. doi: 10.2147/BTAT.S62984

Table 1. RT and heights of two characteristic peaks in HPLC fingerprints of four fraction extracts of a batch of VA.

VA fraction no	Peak 1 RT (min)	Peak 2 RT (min)	Mean RT (min)	SD RT (min)	Peak 1 height (mAU)	Peak 2 height (mAU)	Mean height (mAU)	SD height (mAU)
4	2.206	2.208	2.207	0.001	5.50	14.0	9.75	6.010
A-2	2.210	2.213	2.2115	0.002	1.2	3.5	2.35	1.626
B-2	2.185	2.187	2.186	0.001	6.9	25.0	15.95	12.799
B-3	2.150	2.152	2.151	0.001	2.25	6.7	4.475	3.147

Notes: All fraction peaks expressed at a relatively similar retention time, while higher peak height was expressed in fractions 4 and B-3. Fingerprint experiment was conducted in duplicates, and mean and standard deviations for peak height and retention time computed.

Abbreviations: RT, retention time; VA, Vernonia amygdalina; SD, standard deviation; HPLC, high performance liquid chromatography.