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

Table 8

Evaluation of the interday and intraday precision and accuracy for PGZ-HCl and CRV obtained by Method B.

Drug	Method	Taken; conc.; (𝜇gmL^−1)	Interday			Intraday
			Recovery (%)^a	Precision (RSD%)^a	Accuracy; (Er%)	Recovery (%)^a	Precision; (RSD%)^a	Accuracy; (Er%)
PGZ-HCl	Fast green	1	98.94	1.80	−1.06	99.24	1.03	−0.76
		2	99.55	1.09	−0.45	99.97	0.95	−0.03
		3	100.13	0.78	0.13	98.65	1.17	−1.35
	Orange G	10	99.41	1.31	−0.59	98.71	1.19	−1.29
		30	101.45	0.98	1.45	99.89	1.17	−0.11
		60	99.08	1.13	−0.92	101.65	0.96	1.65
CRV	Fast green	1	98.88	1.21	−1.12	98.56	1.23	−1.44
		2	101.76	0.86	1.76	99.87	1.38	−0.13
		3	99.68	1.49	−0.32	98.78	1.17	−1.22
	Orange G	10	100.43	1.31	0.43	100.57	1.14	0.57
		25	98.13	0.87	−1.87	101.67	1.26	1.67
		40	99.87	1.34	−0.13	101.99	0.87	1.99

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