Simultaneous Determination of Six Major Constituents of the Herbal Formula Insampaedok-san Using HPLC-PDA

Table 3

Precision and accuracy of the analytical results (𝑛=5).

Compound	Fortified conc. (μg mL^−1)	Intraday			Interday
		Observed conc. (μg mL^−1)	Precision (%)	Accuracy (%)	Observed conc. (μg mL^−1)	Precision (%)	Accuracy (%)
	4.00	4.07	1.63	101.70	4.07	0.85	101.73
1	10.00	10.05	1.69	100.46	9.82	0.22	98.16
	20.00	19.96	0.36	99.82	20.08	0.06	100.39
	2.00	1.98	0.44	99.10	2.03	1.13	101.66
2	4.00	3.96	1.14	99.02	4.10	2.56	102.39
	8.00	8.02	0.28	100.30	7.94	0.70	99.30
	20.00	19.70	1.22	98.50	19.21	0.80	96.04
3	50.00	50.21	0.60	100.42	50.11	0.23	100.21
	100.00	99.96	0.12	99.96	100.11	0.08	100.11
	3.00	2.94	1.37	98.12	2.96	0.55	98.82
4	8.00	8.52	0.28	106.51	8.42	0.83	105.27
	15.00	14.73	0.13	98.22	14.78	0.25	98.55
	10.00	10.05	1.70	100.47	9.76	0.60	97.63
5	35.00	34.64	1.19	98.97	34.58	0.52	98.81
	70.00	70.11	0.21	100.16	70.28	0.12	100.40
	6.00	6.34	0.82	105.67	6.34	0.84	105.62
6	15.00	14.50	0.20	96.64	14.44	0.65	96.29
	30.00	30.18	0.04	100.61	30.21	0.13	100.70