Table 6 Optimization conditions
Reagents used | Volume ratio (ml) | Temperature (oC) | Decomopstion time (hour) | Observations | |
|---|---|---|---|---|---|
1 | HNO3:H2O2 | 5:3 | 200 | 3 | Clear yellow |
2 | HNO3: H2O2 | 4:3 | 200 | 3 | Yellow |
3 | HNO3:H2O2 | 3:1 | 150 | 2.5 | Clear colorless |
4 | HNO3:H2O2 | 3:5 | 150 | 2 | Yellow |
5 | HNO3:HClO4 | 5:1 | 250 | 3 | Clear Colorless |
6 | HNO3:HClO4 | 5:2 | 250 | 3 | Pale yellow |
7 | HNO3:HClO4 | 3:5 | 200 | 2 | Yellow |
8 | HNO3:HClO4:H2O2 | 5:3:1 | 300 | 3.5 | Colorless |
9 | HNO3:HClO4:H2O2 | 5:3:2 | 300 | 3.5 | Clear yellow |