Tab. 2.

Intra-day and inter-day precision of ACF, PCM and TRM (n=6)

		Repeatability (intra-day)			Intermediate precision (inter-day)
Drug	Conc. (μg mL−1)	Found conc. ± S.D.	% R.S.D.	S.E.	Found conc. ± S.D.	% R.S.D.	S.E.
ACF	40	39.57 ± 0.16	0.41	0.07	39.74 ± 0.28	0.70	0.11
	100	99.19 ± 0.25	0.25	0.10	98.58 ± 0.18	0.18	0.07
	160	160.55 ± 1.34	0.84	0.55	161.02 ± 1.67	1.04	0.68
PCM	130	131.25 ± 0.42	0.32	0.17	131.86 ± 0.85	0.64	0.34
	325	320.22 ± 1.96	0.61	0.80	319.01 ± 1.10	0.35	0.44
	520	528.15 ± 2.78	0.53	1.13	526.33 ± 1.50	0.29	0.61
TRM	15	15.16 ± 0.03	0.19	0.01	15.14 ± 0.04	0.25	0.02
	37.5	37.44 ± 0.07	0.18	0.03	37.38 ± 0.02	0.06	0.01
	60	60.09 ± 0.05	0.09	0.02	60.14 ± 0.09	0.15	0.03