Table 3 Variations in intraday and interday precision of HPLC methods for the determination of the four flavonoids (1–4)

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