Table 3.

Variations in intraday and interday precision of HPLC methods for the determination of the four flavonoids (1–4)

Flavonoids	Intraday precision (n = 3)		Interday precision (n = 6)
	Content (mg/g)	RSD a (%)	Content (mg/g)	RSD a (%)
1	0.81 ± 0.01	1.32	0.75 ± 0.04	4.73
2	0.53 ± 0.02	2.90	0.52 ± 0.01	2.16
3	0.42 ± 0.02	2.60	0.37 ± 0.02	4.88
4	0.25 ± 0.01	2.83	0.23 ± 0.01	4.81

^aRSD (%) = 100 × SD / mean.