S.No Lopinavir Ritonavir
Intra-day Inter-day Intra-day Inter-day
Conc. (µg/ml) % RSD Conc.
(µg/ml)
% RSD Conc.
(µg/ml)
% RSD Conc.
(µg/ml)
% RSD
1 40 1.31±0.56 40 1.58±0.43 10 0.85±0.49 10 0.94±0.32
2 80 1.48±0.68 80 1.54±0.36 20 1.32±0.81 20 1.54±0.76
3 120 0.71±0.09 120 1.98±0.23 30 0.92±0.62 30 0.56±0.23
4 160 1.84±0.48 160 1.62±0.33 40 0.87±0.45 40 0.86±0.43
5 200 1.23±0.54 200 1.41±0.36 50 0.95±0.36 50 0.96±0.45
Table 3: Precision data for the analysis of lopinavir and ritonavir.