Table 2.
Temperature program employed in the determination of Cd and Pb in the digestates of polyurethane foam by GF AAS.
| Step | T (°C) | Ramp (s) | Hold (s) | Ar flow rate (L·min−1) |
|---|---|---|---|---|
| Drying I | 95 | 10.0 | — | 0.3 |
|
| ||||
| Drying II | 140 | 12.0 | 20.0 | 0.3 |
|
| ||||
| Pyrolysisa | 700 (Cd) | 5.0 | 5.0 | 0.3 |
| 1000 (Pb) | ||||
|
| ||||
| Atomizationa | 1800 (Cd) | 2.0 | 1.0 (Cd) | 0.0 |
| 2000 (Pb) | 2.0 (Pb) | |||
|
| ||||
| Cleaning | 2000 (Cd) | 5.0 | — | 0.3 |
| 2100 (Pb) | ||||
aOptimum temperatures of pyrolysis and atomization were set by analyzing the profile of the respective curves (see text for details).