International Journal of Pharma Research & Review, August 2012; 1 ...

Design-Expert® Software
Factor Coding: Actual
Q4
Design points above predicted value
Design points below predicted value
X1 = A: Gum concentration
X2 = B: Type of diluent
International Journal of Pharma Research & Review, August 2012; 1(4):12-20
Table 6: Dissolution characteristics of formulations in a 3 2 full factorial design
Trail no Formulation
code
Q 4
20
15
10
5
0
1.00
0.50
B: Type of diluent
0.00
-0.50
Design-Expert® Software
Factor Coding: Actual
Q7
Design points above predicted value
Design points below predicted value
X1 = A: Gum concentration
X2 = B: Type of diluent
Figure 2A: Response surface plot of
tablet formulations after 4 hours
dissolution
Design-Expert® Software
Factor Coding: Actual
Q10
Design points above predicted value
Design points below predicted value
X1 = A: Gum concentration
X2 = B: Type of diluent
-1.00 -1.00
Q 1 0
-0.50
0.00
0.50
A: Gum concentration
100
80
60
40
20
1.00
0.50
B: Type of diluent
0
Coded factor
levels
0.00
1.00
-0.50
-1.00 -1.00
Q 7
Figure 2B: Response surface plot of
tablet formulations after 7 hours
dissolution
J Lakshmi Prasanna et.al, IJPRR 2012; 1(4) 17
60
50
40
30
20
10
1.00
0.50
B: Type of diluent
-0.50
0.00
0.00
0.50
-0.50
A: Gum concentration
Figure 2C: Response surface plot of
tablet formulations after 10 hours
dissolution
Percentage drug
released
X1 X2 Q4 Q7 Q9
1.00
-1.00
-1.00
-0.50
Zero
order
rate
constant
1 F1 -1 -1 19.87 42.37 63.11 7.837 6.37
2 F2 0 -1 9.6 22.47 48.6 5.337 9.36
3 F3 1 -1 4.23 15.24 23.4 2.427 20.6
4 F4 -1 0 11.8 33.24 55.42 4.71 10.61
5 F5 0 0 7.94 19.61 39.15 3.12 16.02
6 F6 1 0 5.71 13.36 20.75 1.92 26.04
7 F7 -1 1 19.48 50.87 82.32 7.45 6.71
8 F8 0 1
14.73 44.87 68.1 6.27 7.97
9 F9 1 1 13.91 37.47 59.92 5.29 9.45
0.00
0.50
1.00
A: Gum concentration
T50%