Table 2.
ICP-MS operating conditions and measurement parameters.
| Parameter | Value |
|---|---|
| RF power | 1550 W |
| Argon flow rates | |
| Cooling | 14 L min−1 |
| Auxiliary | 0.75 L min−1 |
| Nebulizer | 1.05 L min−1 |
| Sample cone | Ni |
| Skimmer cone | Ni |
| Analyte | 56Fe, 66Zn, 43Ca, 31P |
| Internal standard | 45Sc (Fe), 89Y (Zn, Ca, P) |
| Acquisition/scanning mode | STD (Ca), KED-H2 (Zn, P), 0V–H2 (Fe) |
| Sweeps per reading | 100 |
| Dwell time | 10 ms (Zn, Ca, P), 40 ms (Fe) |
| No. of runs | 5 |
| Replicate time | 21 s |
| Sample uptake rate | 0.2 mL min−1 |
| Wash time between samples (2% HNO3) | 40 s |
| Uptake time | 50 s |