| 2017 instrument conditions |
|
| ICP System, quartz glass “torch” | Agilent 7700x ICP-MS |
| RF forward power | 1550 W |
| Frequency | 27.12 MHz |
| Depth sampled | 8 mm above load coil |
| Plasma torch Ar gas flow rate | 15 L・min−1 |
| He collision cell, ORS3 | 4.5 mL/minute He when ON |
| Kinetic energy discrimination of ORS3 | 4 V ED |
| Autosampler | ASX-500 |
| Sample uptake rate | 0.8 ml/min |
| Peristaltic pump | 0.1 rps |
| Nebulizer | Concentric GE MicroMist |
| Nebulizer (carrier) Ar gas flow | 1.0 L・min−1 |
| Auxiliary (make-up) gas flow | 0.1 L・min−1 |
| Spray chamber | Scott double pass, quartz glass, Peltier pump, 2˚C |
| Ni sampler cone orifice | 1.0 mm |
| Ni skimmer cone orifice | 0.7 mm |
| External-1 lens voltage | 0 V (to improve stability) |
| Detector | Electron multiplier |
| Data collection; 3 scans through mass range per sample | Analyte peak jump mode |
| Total acquisition time per sample excluding wash | 75.56 s |
| Each mass, 3 points 0.25 amu apart; Dwell time 0.1 s | 0.3 s |
| Peak width at half height | ~0.7 amu |
| CeO/Ce and Ce2+/Ce+ | 1.35% and 1.32% |
| 2018 data collection differences |
|
| Data collection; 10 scans through mass range per sample | Analyte peak jump mode |
| Total acquisition time per sample excluding wash | 75.56 s |
| CeO/Ce and Ce2+/Ce+ | 0.45(5)% and 0.97(9)% |