Table 4.

Intra-day and inter-day precision data for the studied drugs using the proposed methods.

Method I
CAF
Concentration (ng/mL)		Intraday precision		Interday precision
		X̅ ± SD	%RSD	X̅ ± SD	%RSD
	100.0	98.51 ± 0.24	0.24	98.35 ± 1.89	1.92
	200.0	101.0 ± 1.37	1.36	100.17 ± 1.77	1.76
	400.0	101.63 ± 0.16	0.16	100.92 ± 1.95	1.93
Method II
Concentration (ng/mL)
CAF	200.0	98.25 ± 0.62	0.63	98.44 ± 0.61	0.62
	700.0	99.32 ± 1.84	1.86	97.94 ± 0.66	0.67
	1000.0	99.43 ± 1.31	1.31	99.32 ± 0.62	0.63
CUR	50.0	100.09 ± 1.93	1.93	98.41 ± 1.64	1.66
	100.0	99.23 ± 1.49	1.50	98.85 ± 1.80	1.82
	150.0	102.43 ± 0.53	0.51	100.25 ± 2.07	2.06