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

Table 2

Assay of five replicate samples of the studied drugs by NBS/INC method at one concentration level.

Drug	Conc. (µg/mL)	Absorbance					Mean ± SD	RSD
		1	2	3	4	5
NIF	7.50	0.587	0.582	0.589	0.583	0.586	0.585±0.003	0.440
NIC	10.0	0.611	0.613	0.612	0.615	0.617	0.614±0.002	0.351
NIM	8.00	0.548	0.546	0.547	0.551	0.549	0.548±0.001	0.314
FEL	5.00	0.521	0.525	0.523	0.528	0.526	0.525±0.002	0.461
AML	8.00	0.527	0.533	0.531	0.529	0.532	0.530±0.003	0.406