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Table 4 Precision, repeatability of seven analytes

From: Chemical fingerprinting and quantitative constituent analysis of Siwu decoction categorized formulae by UPLC-QTOF/MS/MS and HPLC-DAD

Analytes Precision (RSD,%) Repeatability (RSD,%; n = 6)
Intraday (n = 6) Interday (n = 6) SWD SFZYD XFSWD THSWD QLSWD
Gallic acid 1.75 1.78 1.81 1.26 2.84 3.32 1.31
Protocatechuic acid 0.76 1.21 3.16 1.90 2.72 4.18 3.19
Vanillic acid 1.31 1.55 1.79 1.05 2.26 3.97 2.80
Caffeic acid 0.98 0.97 2.27 2.47 1.60 4.52 3.04
Paeoniflorin 1.06 2.01 2.72 3.58 2.38 3.96 2.19
Ferulic acid 0.88 1.05 2.19 3.01 1.26 2.95 2.22
Senkyunolide I 1.16 1.12 2.22 3.97 1.43 1.82 3.75