HPLC Quantitative Analysis of Main Stilbenes and Flavones in Different Parts of Matteuccia struthiopteris

Table 3

Recovery of each compound as determined by standard addition method (in rhizome) (𝑛=6).

Compound no.	Initial concentration; (μg/mL)	Amount added; (μg)	Concentration after addition (μg/mL)		Recovery (%)	RSD (%)
			Expected	Measured
1	143.88	161.30	305.18	305.97	100.26	0.75
2	90.84	92.23	183.07	182.94	99.93	0.78
3	6.67	6.40	13.07	12.82	98.09	1.26
4	12.91	11.73	24.64	25.11	101.91	1.01
5	8.52	8.09	16.61	17.18	103.43	0.72
6	23.28	27.87	51.15	52.97	103.56	1.00

The data was present as average of six determinations.