Simultaneous Extraction Optimization and Analysis of Flavonoids from the Flowers of Tabernaemontana heyneana by High Performance Liquid Chromatography Coupled to Diode Array Detector and Electron Spray Ionization/Mass Spectrometry

Table 4

Flavonoid yield in the flowers of T. heyneana using ethyl acetate as extracting solvent.

Exp.	A	B	C	D	Flavonoid yield (mg/g)
1	1	1	1	1	2.8
2	1	2	2	2	3.7
3	1	3	3	3	9.4
4	2	1	2	3	6.4
5	2	2	3	1	10.4
6	2	3	1	2	8.9
7	3	1	3	2	20.5
8	3	2	1	3	18.2
9	3	3	2	1	11.0
𝐾1	5.3	9.9	10	8.0
𝐾2	8.5	10.8	7.0	11.0
𝐾3	16.6	9.8	13.4	11.3
𝑘1	1.8	3.3	3.3	2.7
𝑘2	2.8	3.6	2.3	3.7
𝑘3	5.5	3.3	4.5	3.8
𝑅	3.7	0.3	2.2	1.1