Table 3.

Intra-day and inter-day precision and accuracy for the determination of AZI and LEVO mixtures using the proposed spectrophotometric methods.

Concentration (μg/mL)		Method	Recovery % ± SDa		RSD%b		Er%c
AZI	LEVO		AZI	LEVO	AZI	LEVO	AZI	LEVO
(a) Accuracy and intra-day precision
10	20	Direct	101.05 ± 0.59	100.95 ± 0.26	0.58	0.25	1.05	0.95
		D1	100.53 ± 1.75	100.32 ± 0.69	1.75	0.69	0.53	0.32
40	10	Direct	100.75 ± 0.81	100.79 ± 0.12	0.79	0.12	0.75	0.97
		D1	99.99 ± 0.91	100.32 ± 0.69	0.91	0.69	-0.01	0.32
20	20	Direct	99.69 ± 0.44	100.76 ± 0.91	0.44	0.91	-0.31	0.76
		D1	100.85 ± 0.51	101.58 ± 0.91	0.51	0.90	0.85	1.58
(b) Accuracy and inter-day precision
10	20	Direct	101.44 ± 0.89	100.89 ± 0.36	0.88	0.35	1.44	0.87
		D1	99.36 ± 1.01	99.92 ± 0.53	1.02	0.53	-0.64	-0.08
40	10	Direct	100.02 ± 0.22	100.83 ± 0.33	0.22	0.33	0.02	0.83
		D1	100.57 ± 1.16	100.25 ± 0.64	1.15	0.64	0.57	0.25
20	20	Direct	101.53 ± 1.12	98.70 ± 0.69	1.09	0.69	1.53	-1.29
		D1	101.14 ± 0.88	101.27 ± 1.13	0.87	1.12	1.14	1.27

(a) is standard deviation, (b) is percentage relative standard deviation and (c) is percentage error.