TABLE 1.
Instrumental conditions of Thermo Fisher iCAP TQ ICP-MS/MS for impurity analysis.
| ICP source operation parameters | |
|---|---|
| RF power | 1550 W |
| Ar plasma gas flow | 16 L/min |
| Ar auxiliary gas flow | 1.0 L/min |
| Nebulizer gas flow | 1.12 L/min |
| Nebulizer | Borosilicate glass concentric nebulizer |
| Sample uptake rate | 0.3 ml min−1 |
| Spray chamber | Borosilicate glass cyclonic spray chamber |
| Sampling cone and skimmer cone | Ni sampling cone, Ni skimmer cone |
| Spectrometer operating parameters | |
| Measured isotopes and measurement modes | Single Quadrupole Mass Spectrometry mode |
| 89Y, 141Pr, 142Ce, 143Nd, 145Nd, 146Nd, 147Sm, 149Sm, 151Eu, 157Gd, 159Tb, 161Dy, 163Dy, 165Ho, 166Er, 167Er, 169Tm, 172Yb, 175Lu, 232Th | |
| H2 gas collision reaction mode; H2 gas flow 10 ml min−1 | |
| 45Sc (45; m/z at QMS1, 45: m/z at QMS2) | |
| Dwell time | 100 ms |
| Number of sweeps | Ten times |
| Measurement repetition | Five times |