Simple Methods for the Spectrophotometric Determination of Carvedilol

Table 3

Evaluation of accuracy and precision.

Method A
Amount taken (𝜇g mL^−1)	*Amount found (μg mL^−1)	RE (%)	SD (μg mL^−1)	RSD (%)
100.00	100.40	0.40	0.01	1.39
150.00	149.70	0.66	0.02	1.49
200.00	200.20	0.10	0.02	0.98
Method B
Amount taken (μg mL^−1)	**Amount found (μg mL^−1)	RE (%)	SD (μg mL^−1)	RSD (%)
20.00	19.89	0.55	0.18	0.92
40.00	40.12	0.30	0.21	0.54
80.00	79.62	0.48	0.64	0.81
100.00	99.35	0.65	0.59	0.60

*Mean value of four determinations.
**Mean value of three determinations.
RE: relative error; SD: standard deviations; RSD: relative standard deviation.