Table 4: The validation results of NIR determination of tanshinoneIIA.

Theoretical concentration (%)Mean calculated content (%)TruenessPrecision
Relative bias (%)Recovery (%)Repeatability (%)Intermediate precision (%)

0.10−0.20−294.70−194.70390.80390.80
0.15−0.13−184.44−84.44250.76250.76
0.360.24−32.9667.0487.8593.70
0.540.8558.02158.0247.4047.40
2.041.60−21.6778.3316.0417.95
6.035.95−1.3498.666.376.37
18.7618.34−2.2697.743.313.36
27.6426.45−4.3095.701.631.91