Table 6 Assay data for marketed drug using internal standard of cyanocobalamine
Active pharmaceutical ingredient | Nominal concentration (µg/mL) | Mean peak area ratio | Mean actual concentration (µg/mL) | Mean content % |
|---|---|---|---|---|
Chlorpheniramine maleate | 0.100 | 0.098 | 0.098 | 98.0 ± 1.30 |
Paracetamol | 12.500 | 1.022 | 12.775 | 102.2 ± 0.80 |
Caffeine | 0.750 | 1.017 | 0.763 | 101.7 ± 1.10 |