Table 3. Intra- and inter-day precisions of active compounds

Combined extract (µg/mL)	Precision: RSD (%)
	Decursinol angelate (1)		Decursin (2)
	Intra-day (n = 3)	Inter-day (n = 9)	Intra-day (n = 3)	Inter-day (n = 9)
1	0.34	1.07	0.52	0.28
3	0.09	0.25	0.24	0.40
10	0.09	0.22	0.10	0.03

RSD, relative standard deviation.