Table 4 Precision of silymarin analysis using HPLC and UPLC methods

	Compound	Peak area (RSD%)	Retention time (RSD%)
HPLC	Silychristin	1.28	0.34
	Silydianin	1.33	0.38
	Silybin A	1.27	0.64
	Silybin B	1.28	0.73
	Isosilybin A	1.29	0.89
	Isosilybin B	1.34	0.96
UPLC	Silychristin	0.50	0.03
	Silydianin	0.46	0.03
	Silybin A	0.49	0.04
	Silybin B	0.50	0.05
	Isosilybin A	0.51	0.05
	Isosilybin B	0.51	0.05