Spectrophotometric Method for Determination of Five 1,4-Dihydropyridine Drugs Using N-Bromosuccinimide and Indigo Carmine Dye

Table 1

Quantitative parameters and statistical data for determination of the studied drugs using NBS/INC method.

Drug	Linear range (𝜇g/mL)	Intercept ± SD^1	Slope ± SD^1	𝑟	𝜀×10^4 (L mol^−1 cm^−1)	LOD (𝜇g/mL)	LOQ (𝜇g/mL)
NIF	1.25–12.00	0.041±0.008	0.067±0.001	0.998	2.511	0.376	1.253
NIC	1.50–13.00	0.003±0.009	0.056±0.001	0.997	2.945	0.498	1.660
NIM	1.50–13.00	0.070±0.010	0.060±0.001	0.997	2.746	0.500	1.666
FEL	1.25–10.00	0.076±0.004	0.085±0.001	0.999	3.914	0.141	0.470
AML	1.50–13.00	0.046±0.004	0.059±0.001	0.999	3.728	0.203	0.677

1Mean of three determinations.