Simultaneous Estimation of Ambroxol Hydrochloride and Cetirizine Hydrochloride in Pharmaceutical Tablet Dosage Form by Simultaneous Equation Spectrophotometric Method: A Quality Control Tool for Dissolution Studies

Table 2

Absorbance and absorptivity values of Cetirizine Hydrochloride at λ _max 244 nm and 230 nm, respectively.

Serial number	Concentration; (µg/mL)	*Absorbance at 244 nm ± S.D	*Absorbance at 230 nm ± S.D	Absorptivity at 244 nm	Absorptivity at 230 nm
1	2	0.019±0.004	0.077±0.002	0.0095	0.0385
2	4	0.025±0.003	0.135±0.003	0.0063	0.0375
3	6	0.045±0.002	0.209±0.003	0.0075	0.0348
4	8	0.051±0.005	0.267±0.001	0.0064	0.0334
5	10	0.054±0.003	0.332±0.004	0.0054	0.0332
6	12	0.069±0.002	0.393±0.002	0.0058	0.0328
7	14	0.078±0.001	0.468±0.002	0.0056	0.0334
8	16	0.089±0.002	0.530±0.003	0.0056	0.0331
9	18	0.100±0.003	0.585±0.001	0.0056	0.0325
10	20	0.107±0.001	0.653±0.002	0.0054	0.0327
			Average	𝑎𝑦1=0.0063	𝑎𝑦2=0.0338

∗Each value is the average of three determinations.