Table 5 Calculated rate constants and half-lifes for the disappearance of caffeine in water at 30°C, extrapolated from experimental data
From: Caffeine in surface and wastewaters in Barbados, West Indies
pH | k (min −1 ) | Half-life (Years) |
|---|---|---|
6 | 6.6×10−11 | 2.0×104 |
7 | 6.6×10−10 | 2.0×103 |
8 | 6.6×10−9 | 2.0×102 |
9 | 6.6×10−8 | 2.0×101 |