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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

Medicine

Mass of unknown sample

Mass of clavulanic acid (CA) per pill

Mean amount of clavulanic acid (CA) (in mg)

SD(a)

RSD (b) (%)

Relative deviation (%)©

USP requirement

Drug1.1

1478.1

150.452

147.44

2.91

1.97

17.95

90–120%

Drug1.2

1451.1

147.259

Drug1.3

1471.8

144.623

Drug2.1

1477.9

146.529

148.29

1.69

1.14

18.63

90–120%

Drug2.2

1544.8

148.447

Drug2.3

1548.8

149.912

Drug3.1

1463.0

141.884

144.37

2.56

1.77

15.5

90–120%

Drug3.2

1459.1

144.227

Drug3.3

1474.1

147.013

Drug4.1

1501.6

150.575

151.64

1.39

0.92

21.31

90–120%

Drug4.2

1501.3

151.137

Drug4.3

1512.2

153.226

Drug5.1

1513.3

147.668

147.73

0.88

0.6

18.18

90–120%

Drug5.2

1519

146.885

Drug5.3

1532.6

148.665

  1. a: SD = \( \sqrt{\frac{\sum \left(x-\overline{x}\right)}{n}} \) b: RSD = \( \frac{SD\ }{\overline{X}}\times 100 \) c: RD = \( \frac{experimental- expected}{expected} \)