Round robin tests XRF-analysis XRF Round-robin test GeoPT17 - OU-8, Calcearous Sandstone
Study organized by:
International Association of Geoanalysts and Geostandards Newsletter - GeoPT17
Material of proficiency test:
OU-8, Calcearous Sandstone
Study finished:
2005 - 8
Literature:
Preliminary Report - GeoPT17 Proficiency Testing Round
major elements [wt %]
| CRB | RV | 1sRV | Z-Score | |
| Na₂O | 0,600 | 0,677 | 0,014 | |
| MgO | 1,830 | 1,879 | 0,034 | |
| Al₂O₃ | 6,640 | 6,548 | 0,099 | |
| SiO₂ | 54,070 | 54,120 | 0,594 | |
| P₂O5 | 0,028 | --- | ||
| SO₃ | 0,280 | --- | ||
| K₂O | 2,970 | 2,967 | 0,050 | |
| CaO | 16,710 | 16,711 | 0,219 | |
| TiO₂ | 0,251 | 0,244 | 0,006 | |
| Fe₂O₃ tot | 1,340 | 1,304 | 0,025 | |
| MnO | 0,155 | 0,138 | 0,004 |
trace elements [µg/g]
| CRB | RV | 1sRV | Z-Score | |
| Ba | 501,00 | 528,00 | 16,40 | |
| Cr | 37,00 | 21,50 | 1,08 | |
| Ga | 7,90 | 6,30 | 0,38 | |
| Nb | 3,50 | 4,20 | 0,38 | |
| Ni | 165,00 | 145,70 | 5,40 | |
| Pb | 17,00 | 9,60 | 0,55 | |
| Sr | 287,00 | 264,00 | 9,14 | |
| V | 28,00 | 29,80 | 1,43 | |
| Y | 14,00 | 16,00 | 0,84 | |
| Zr | 199,00 | 182,70 | 6,70 |
Legend
CRB
results CRB
cooperative test
results collaborative study
1s-RV
Standard deviation collaborative study
Z-Score
Difference of measured value from mean study
*
Value not certified
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