Compound

Spiked concentration (μg/mL)

Extraction recovery (%)

RSD (%)

Matrix effect (%)

RSD (%)

Poliumoside

0.2

93.89

1.20

105.34

2.71

1

103.32

7.98

92.49

14.94

8

99.92

6.10

100.27

12.65

Caffeic acid

10

93.80

3.65

94.21

4.51