Table 6: Diltiazem Hydrochloride stock solution and dilutions absorbances and concentrations.

S. No	conc. (mg/ml)	abs(1)	abs(2)	abs(3)	Average abs
1	0.00625	0.021	0.022	0.023	0.022
2	0.0125	0.045	0.044	0.043	0.044
3	0.025	0.086	0.085	0.084	0.085
4	0.05	0.174	0.176	0.178	0.176
5	0.1	0.344	0.343	0.345	0.344