Table 1. Operating parameters for REE determination using ICP-OES and ICP-MS.
| Instrument settings | ICP-OES | ICP-MS |
|---|---|---|
| Rf power | 1000 W | 1100 W |
| Plasma gas (Ar) flow rate | 15 L min-1 | 15 L min-1 |
| Auxiliary gas (Ar) flow rate | 1.5 L min-1 | 1.2 L min-1 |
| Nebulizer gas flow rate | 0.6 L min-1 | 0.8 L min-1 |
| Nebulizer | Concentric | Concentric |
| Dwell time | - | 50 ms |
| Pump speed | 15 rpm | - |
| Nebulizer pressure | 200KPa | - |
| Repetition views | 2 | 3 |
| Analytical wavelength (nm) | Ce 418.659, Dy 353.170, | - |
| Er 337.275, Eu 381.967, | ||
| Gd 335.047, Ho 345.600 | ||
| La 408.672, Lu 261.542, | ||
| Nd 401.225, Pr 417.939, | ||
| Sm 359.259, Tb 350.917, | ||
| Tm 313.126, Yb 328.937, | ||
| Y 324.228, Sc 361.383 |