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

From: Flavonoids with α-glucosidase inhibitory activities and their contents in the leaves of Morus atropurpurea

Flavonoids Intraday precision (n = 3) Interday precision (n = 6)
Content (mg/g) RSDa(%) Content (mg/g) RSDa(%)
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
  1. aRSD (%) = 100 × SD / mean.