Table 1.

Performance data of the determination of MTP and FLD in pure form by the proposed method

Parameter	Metoprolol	Felodipine
Concentration range (μg/mL)	0.5-10.0	0.2-2.0
Correlation coefficient	0.9999	0.9999
Slope	56.36	164.51
Intercept	11.12	7.15
Limit of detection (LOD) (μg/mL)	0.11	0.02
Limit of Quantification (LOQ) (μg/mL)	0.32	0.06
Sy/x	2.87	1.31
Sa	1.82	0.91
Sb	0.33	0.91
%RSD	1.49	1.17
%Er	0.61	0.48

S_y/x, Standard deviation of the residuals;

S_a, Standard deviation of the intercept

% RSD = Relative standard deviation;

S_b, Standard deviation of the slope

% Error = %RSD/√n.

n = 6.