Nominal concentration (ng/mL) Intra-day Inter-day Extraction recovery(%)
RSD(%) Accuracy(%) RSD(%) Accuracy (%)
25 4.56 99.88 ± 4.56 13.72  95.60 ± 13.04 92.28 ± 5.90
100 1.21 97.92 ± 1.97 3.59 97.91 ± 1.70 97.44 ± 3.46
400 2.34 89.86 ± 2.10 3.77 88.30 ± 3.33 97.34 ± 3.05
Table 1: Precision and recovery of paeonol (n = 5).