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Table 4 Amount in mg of clavulanic acid in the tested weighed pill

From: Are antibiotics substandard in Lebanon? Quantification of active pharmaceutical ingredients between brand and generics of selected antibiotics

MedicineMass of unknown sampleMass of clavulanic acid (CA) per pillMean amount of clavulanic acid (CA) (in mg)SD(a)RSD (b) (%)Relative deviation (%)©USP requirement
Drug1.11478.1150.452147.442.911.9717.9590–120%
Drug1.21451.1147.259
Drug1.31471.8144.623
Drug2.11477.9146.529148.291.691.1418.6390–120%
Drug2.21544.8148.447
Drug2.31548.8149.912
Drug3.11463.0141.884144.372.561.7715.590–120%
Drug3.21459.1144.227
Drug3.31474.1147.013
Drug4.11501.6150.575151.641.390.9221.3190–120%
Drug4.21501.3151.137
Drug4.31512.2153.226
Drug5.11513.3147.668147.730.880.618.1890–120%
Drug5.21519146.885
Drug5.31532.6148.665
  1. a: SD = \( \sqrt{\frac{\sum \left(x-\overline{x}\right)}{n}} \) b: RSD = \( \frac{SD\ }{\overline{X}}\times 100 \) c: RD = \( \frac{experimental- expected}{expected} \)