Determination of Atenolol and Trimetazidine in Pharmaceutical Tablets and Human Urine Using a High Performance Liquid Chromatography-Photo Diode Array Detection Method

Table 4

Intra- and interday precision and accuracy calculated from quality control (QC) samples in pure form.

QC conc. (μg/mL)	Intra-day				Inter-day
	Mean (μg/mL)	SD	RSD	DFN	Mean (μg/mL)	SD	RSD	DFN
ATN
3	2.97	0.02	0.77	-1.12	3.01	0.05	1.7	0.25
50	50 .95	0.45	0.88	1.89	50.17	0.41	0.82	0.34
75	75.004	0.12	0.17	0.005	76.36	0.29	0.39	1.82
TMZ
3	2.89	0.09	3.45	-3.67	2.88	0.09	3.02	-3.99
50	50.09	0.23	0.45	0.18	50.07	0.26	0.52	0.15
75	77.14	1.31	1.7	2.85	76.34	2.05	2.68	1.78