Tablets
|
Labeled amount of PDE
|
Average PDE found (mg/tablet) ± SD
a
(recovery %)
b
|
t
- and
F
test
c
|
---|
Proposed method
|
Reference method
d
|
---|
Revosyl | 4 mg | 4.10 ± 0.036 (102.50) | 4.06 ± 0.024 (101.50) | 1.734, 2.207 |
| 8 mg | 8.34 ± 0.064 (104.25) | 8.44 ± 0.040 (105.50) | 2.464, 2.612 |
Neomeril | 4 mg | 3.86 ± 0.035 (96.50) | 3.90 ± 0.026 (97.50) | 1.604, 1.830 |
| 8 mg | 7.77 ± 0.075 (97.12) | 7.87 ± 0.042 (98.37) | 2.299, 3.196 |
-
aAverage and standard deviation of five determinations for the proposed method and three determinations for the reference method.
-
bRecoveries were calculated considering the labeled amount reported by the manufacturer.
-
cThe tabulated t-value at 95% confidence limit for 4 degrees of freedom (n = 5) is 2.78 and the tabulated F value at 95% confidence limit for (4, 2) degrees of freedom for the proposed and reference methods, respectively, is 6.944.
-
dHPLC (Raju and Rao 2011.