Table 2.
ICP-MS operating conditions
| ICP-MS | |
| Instrument | ELAN 9000 PerkinElmer Sciex ICP |
| As isotope mass | 74.9216 |
| In internal standard isotope mass | 114.904 |
| Acquisition modes | Scanning |
| Scan mode | Peak hopping |
| Dwell time | 50 ms |
| Channels/amu | 1 |
| Passes/scan | 60 |
| Scans/sample | 3 |
| Nebulizer type | Concentric |
| Sample uptake flow rate | 10 (arbitrary units) |
| Carrier gas | 0.91 L/minute |
| RF power | 1,100 W |
| Lens voltage | 7.5 V |
| Analog-stage voltage | −1,600 V |
| Pulse-stage voltage | 800 V |
| Desolvation temperature | 140°C |
Abbreviations: ICP-MS, inductively coupled plasma mass spectrometry; RF, radiofrequency; amu, atomic mass unit; As, arsenic.