Table 4. Accuracy data of active compounds

Compounds Original (ng/mL) Spiked (ng/mL) Detected (ng/mL) Recovery (%) RSD (%)
Decursinol angelate (1) 186.54 20 208.25 108.57 0.35
100 283.15 96.61 0.33
800 984.85 99.78 0.07
Decursin (2) 308.78 30 335.82 90.13 2.31
200 511.73 101.47 0.33
1,333 1,639.06 99.79 0.03
RSD, relative standard deviation; The original is the compound concentration corresponding to 5 ppm of combined extract.