Table 1 Regression equations for the reaction rate and fixed time methods for the determination of pregabalin
From: Kinetic spectrophotometric determination of an important pharmaceutical compound, pregabalin
Method | Regression equation | r 2 |
|---|---|---|
Reaction rate method | Rate = 2.8 × 10-4 + 2.48 × 10-4 × drug concentration | 0.999 |
Fixed time method, time (min) | ||
5 | A = 0.00106 + 0.00123 × drug concentration | 0.999 |
10 | A = -0.0032 + 0.00111 × drug concentration | 0.999 |
15 | A = -0.0038 + 0.00103 × drug concentration | 0.999 |
20 | A = 0.0052 + 7.2 × 10-4 × drug concentration | 0.993 |
25 | A = 0.0036 + 6.4 × 10-4 × drug concentration | 0.999 |
30 | A = 0.0034 + 5.6 × 10-4 × drug concentration | 0.992 |
35 | A = 0.003 + 4.9 × 10-4 × drug concentration | 0.989 |
40 | A = 0.0032 + 4.4 × 10-4 × drug concentration | 0.984 |
45 | A = 0.0026 + 3.8 × 10-4 × drug concentration | 0.979 |
50 | A = 0.0046 + 2.9 × 10-4 × drug concentration | 0.993 |