Table 2: Determination of LVD and ZVD in dosage forms by standard addition method.

Amount of taken drug (μg)Amount of pure drug added (μg)Total amount found (μg)a
(Mean ± S.D.b)
RSD (%)Recovery of pure drug added (%)

LVD10025125.24 ± 1.281.02100.96
100100200.35 ± 1.010.50100.35
100150251.25 ± 2.210.88100.83

ZVD10050150.02 ± 1.020.68100.04
100100201.28 ± 1.240.62101.28
100200300.12 ± 2.080.69100.06

Five independent analyses.
bStandard deviation.