Table 3 Intra-day and Inter-day precision of the proposed HPLC method ( n = 5)
Drugs | Actual concentration ( μg mL-1) | Intra-day precision | Inter-day precision |
|---|---|---|---|
Measured concentration ± SD; RSD (%) | Measured concentration ± SD; RSD (%) | ||
Pheniramine | 150.0 | 147.8 ± 1.1; 1.0 | 147.6 ± 1.3; 1.2 |
600.0 | 608.5 ± 2.4; 0.4 | 607.0 ± 1.3; 1.0 | |
1200.0 | 1194.7 ± 2.7; 0.3 | 1197.6 ± 7.4; 0.6 | |
Naphazoline hydrochloride | 12.5 | 12.6 ± 0.05; 0.4 | 12.5 ± 0.1; 0.9 |
50.0 | 50.3 ± 0.3; 0.5 | 50.4 ± 0.2; 0.4 | |
100.0 | 100.1 ± 0.4; 0.4 | 100.4 ± 0.5; 0.5 |