Simple Atomic Absorption Spectroscopic and Spectrophotometric Methods for Determination of Pioglitazone Hydrochloride and Carvedilol in Pharmaceutical Dosage Forms

Table 4

Evaluation of the interday and intraday precision and accuracy for PGZ-HCl and CRV through Method A.

Drug	Taken conc; (𝜇g mL^−1)	Interday			Intraday
		Recovery; (%)^a	Precision; (RSD%)^a	Accuracy; (Er%)	Recovery; (%)^a	Precision; (RSD%)^a	Accuracy; (Er%)
PGZ-HCl	10	99.65	0.76	−0.35	100.93	1.19	0.93
	15	100.84	0.92	0.84	100.57	1.03	0.57
	40	100.19	0.53	0.19	100.22	0.89	0.22
CRV	15	99.57	1.16	−0.43	99.17	0.78	−0.83
	24	99.98	0.78	−0.02	99.81	1.21	−0.19
	50	99.06	0.95	−0.94	100.85	1.45	0.85

RSD%: percentage relative standard deviation.
Er%: percentage relative error.
^aMean of five trials of determination.