Simultaneous Estimation of Paracetamol, Ambroxol Hydrochloride, Levocetirizine Dihydrochloride, and Phenylephrine Hydrochloride in Combined Tablet Formulation by First-Order Derivative Spectrophotometry
Table 3
Repeatability data for proposed method.
Serial number
Concentration (μg/mL)
Absorbance of PARA at 305.5 nm
Absorbance of AMB at 321 nm
Absorbance of LEVO at 244 nm
Absorbance of PHEN at 280 nm
1
10 ppm
0.0199
0.0027
0.0121
0.0054
2
10 ppm
0.0200
0.0028
0.0120
0.0053
3
10 ppm
0.0203
0.0027
0.0119
0.0052
4
10 ppm
0.0200
0.0027
0.0120
0.0052
5
10 ppm
0.0201
0.0028
0.0120
0.0051
6
10 ppm
0.0200
0.0027
0.0121
0.0053
Mean
0.0201
0.0027
0.0120
0.0052
SD
0.00014
0.000052
0.000075
0.0001
% RSD
0.6874
1.8892
0.6264
1.9977
SD: standard deviation; RSD: relative standard deviation.
