Table 1: Optimization of variables.
Parameter |
Range studied |
Optimum value |
HMDSA (%v/v) |
1.5-12 |
10 |
Temperature (°C) |
60-92 |
90 |
Injection volume (ml) |
100-750 |
500 |
Reaction coil RC1 length (cm) |
100-500 |
300 |
Acid solution flow rate (ml/min) |
0.5-1.3 |
1.0 |
Basic solution flow rate (ml/min) |
1-4 |
3 |
Concentration time (min) |
1-4 |
3 |