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Table II.
Instrumental parameters and electrothermal programmes for ETAAS.
| Cd | Co | Cr | Cu | Mo | Ni | Pb | |||
|---|---|---|---|---|---|---|---|---|---|
| Parameters | Wavelength (nm) | 228.8 | 240.7 | 357.9 | 324.8 | 313.3 | 232.0 | 217.0 | |
| Slit width (nm) | 0.5 | 0.2 | 0.2 | 0.5 | 0.5 | 0.2 | 0.5 | ||
| Lamp current (mA) | 5 | 10 | 9 | 4 | 12 | 12 | 10 | ||
| Sample volume (μL) | 15 | 15 | 10 | 10 | 20 | 20 | 15 | ||
| Modifier volume (μL) | 5 | 5 | 10 | 10 | 0 | 0 | 5 | ||
| Zeeman background correction | Yes | Yes | Yes | Yes | Yes | Yes | Yes | ||
| Graphite furnace steps | Drying 1 | Temperature (ºC) | 100 | 100 | 100 | 100 | 100 | 95 | 100 |
| Time (s) | 30 | 30 | 10 | 30 | 30 | 10 | 30 | ||
| Ramp time (ºC·s−1) | 10 | 10 | 10 | 10 | 10 | 8 | 10 | ||
| Drying 2 | Temperature (ºC) | 150 | 150 | 150 | – | 150 | 150 | 150 | |
| Time (s) | 20 | 15 | 10 | – | 40 | 20 | 15 | ||
| Ramp time (ºC·s−1) | 20 | 20 | 15 | – | 10 | 3 | 20 | ||
| Pyrolysis | Temperature (ºC) | 700 | 1500 | 1300 | 700 | 1800 | 700 | 800 | |
| Time (s) | 20 | 20 | 10 | 20 | 20 | 20 | 40 | ||
| Ramp time (ºC·s−1) | 150 | 3 | 130 | 150 | 150 | 13 | 150 | ||
| Atomization | Temperature (ºC) | 1500 | 2500 | 2500 | 2400 | 2800 | 2300 | 1600 | |
| Time (s) | 3 | 3 | 3 | 3 | 3 | 2.5 | 3 | ||
| Ramp time (ºC·s−1) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| Cleaning | Temperature (ºC) | 2400 | 2600 | 2600 | 2500 | 2850 | 2500 | 2500 | |
| Time (s) | 3 | 3 | 3 | 3 | 3 | 2 | 3 | ||
| Ramp time (ºC·s−1) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||