Drug

Label claim
(mg per tablet)

Amount
 Added (%)

Total amount
    (mg)

Amount recovered
(mg) ± %RSD

   Recovery
        (%)

MET

500

80

 900

907.4 ± 1.21

100.82

100

1000

998.9 ± 0.78

 99.80

120

1100

1107.3 ± 1.56

100.66

ATV

10

 80

18

17.8  ± 1.13

98.88

100

20

20.3 ± 1.43

101.50

120

22

22.3 ± 1.12

101.36

GLM

2

80

3.6

3.57 ± 0.98

99.16

100

4.0

3.95 ± 1.34

98.75

120

4.4

4.37 ± 1.67

99.31