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Table 4 The stability of cucurbitacin B at different storage conditions

From: Pharmacokinetics of cucurbitacin B from Trichosanthes cucumerina L. in rats

Conditions QC concentration (μg/L) Measured values (μg/L) SD %CV %RE %Recovery
Room temperature (12 h) 0.5 0.43 0.02 4.90 14.20 81.34
10 8.20 0.19 2.34 18.01 83.32
15 11.80 0.15 1.25 21.35 86.16
Storage at −20 °C (3 months) 0.5 0.48 0.03 5.66 4.60 90.54
10 9.81 0.65 6.58 1.86 99.72
15 13.46 0.42 3.10 10.29 97.93
Three freeze-thaw cycles 0.5 0.49 0.03 6.39 3.00 92.01
10 9.79 0.22 2.21 2.13 99.50
15 13.68 0.46 3.34 8.81 99.54
Autosampler (10 °C) 0.5 0.47 0.03 7.25 6.20 89.05
10 10.78 0.76 7.01 −7.78 109.57
15 13.84 0.39 2.82 7.71 100.75
  1. QC Quality control, CV Coefficient of variation, RE Relative error