|
Element
|
Method
|
Precision SD
(1  ) (rel%)
|
Accuracy
(rel%) |
|---|---|---|---|
| TS | IR analyzer | 2.7 | 102.6 |
| TC | IR analyzer | 1.3 | 100.5 |
| TIC | Coulometry | 0.8 | 99.8 |
| SiO2 | XRF | 0.4 | 99.7 |
| TiO2 | XRF | 1.0 | 102.8 |
| Al2O3 | XRF | 0.5 | 99.9 |
| Fe2O3 | XRF | 0.4 | 100.6 |
| MnO | XRF | 1.4 | 101.5 |
| MgO | XRF | 0.6 | 108.7 |
| CaO | XRF | 0.5 | 100.4 |
| Na2O | XRF | 0.0 | 98.9 |
| K2O | XRF | 1.4 | 92.7 |
| P2O5 | XRF | 0.7 | 103.4 |
| As | XRF | 2.7 | 93.8 |
| Ba | XRF | 3.0 | 104.7 |
| Co | XRF | 5.4 | 98.1 |
| Cr | XRF | 3.6 | 108.8 |
| Cu | XRF | 3.7 | 89.8 |
| Mo | XRF | 4.7 | 101.6 |
| Ni | XRF | 0.8 | 99.0 |
| Pb | XRF | 9.0 | 93.6 |
| Rb | XRF | 2.0 | 98.2 |
| Sr | XRF | 0.5 | 102.5 |
| U | XRF | 8.8 | 105.5 |
| V | XRF | 1.2 | 104.3 |
| Y | XRF | 3.0 | 100.7 |
| Zn | XRF | 1.7 | 97.8 |
| Zr | XRF | 2.8 | 103.0 |
| REE | ICP-MS | 6.8* | 95.9–102.6† |
Notes: Accuracy is defined as 100% times the mean of the repeat analyses divided by the expected value. Precision is defined as 100% times the best estimate standard deviation (1) divided by the mean of the repeats. SD = standard deviation. REE = rare earth element. IR = infrared, XRF = X-ray fluorescence, ICP-MS = inductively coupled–plasma mass spectrometry. * = maximum value. † = range.