Drug Taken (µg mL-1) Intra-day (n=3) Inter-day (n=3)
Founda (µgmL-1) % RSD %RE Founda (µg mL-1) % RSD %RE
Azithromycin 10.0 10.5 0.5 5.0 10.3 0.8 3.0
20.0 20.5 0.3 2.5 21.0 0.4 5.0
     30.0 31.0 0.1 3.3 31.5 0.2 5.0
Sparfloxacin 25.0 26.0 6.7 4.0 26.0 6.7 4.0
45.0 43.0 3.8 4.4 43.0 3.8 4.4
65.0 66.5 3.8 2.3 66.5 3.8 2.3
Cephalexin
monohydrate
55.0 53.0 0.3 3.6 54.5 4.0 0.9
95.0 93.5 1.7 1.6 95.2 2.6 0.2
145.0 146.4 0.5 1.0 147.0 1.6 1.4
aAverage of three determinations
% RSD: Relative standard deviation
%RE: Relative error
Table 3: Evaluation of intraday and interday precision and accuracy.