Round robin tests XRF-analysis XRF Round-robin test GeoPT26, England - OPC-1, Portland Cement
Study organized by:
International Association of Geoanalysts and Geostandards Newsletter - GeoPT26
Material of proficiency test:
OPC-1, Ordinary Portland Cement)
Study finished:
2010 - 1
Literature:
Preliminary Report - GeoPT26 Proficiency Testing Round
major elements [wt %]
| CRB | RV | 1sRV | Z-Score | |
| Na₂O | ||||
| MgO | 2,600 | 2,540 | 0,050 | |
| Al₂O₃ | 4,680 | 4,550 | 0,072 | |
| SiO₂ | 22,200 | 21,850 | 0,275 | |
| P₂O5 | 0,044 | 0,044 | 0,001 | |
| S* | 0,980 | 0,950 | 0,310 | |
| K₂O | 0,370 | 0,340 | 0,008 | |
| CaO | 63,160 | 62,900 | 0,674 | |
| TiO₂ | 0,340 | 0,318 | 0,008 | |
| Fe₂O₃ tot | 3,270 | 3,190 | 0,054 | |
| MnO | 0,410 | 0,404 | 0,009 | |
| L.O.I.* | 1,090 | 1,230 | 0,370 |
trace elements [µg/g]
| CRB | RV | 1sRV | Z-Score | |
| As | 2,00 | 4,60 | 0,30 | |
| Ba | 482,00 | 512,00 | 16,00 | |
| Ce | 50,00 | 49,00 | 2,20 | |
| Cr* | 185,00 | 186,00 | 40,00 | |
| Cu | 26,00 | 23,70 | 1,20 | |
| Ga | 7,00 | 7,00 | 0,40 | |
| F* | 640,00 | 720,00 | 200,00 | |
| Hf | 2,50 | 2,10 | 0,20 | |
| La | 70,00 | 26,00 | 1,30 | |
| Ni | 94,00 | 87,00 | 3,60 | |
| Pb | 9,00 | 7,20 | 0,40 | |
| Pr | 12,00 | 6,20 | 0,40 | |
| Rb | 20,00 | 14,70 | 0,80 | |
| Sm | 3,00 | 5,00 | 0,30 | |
| Sr | 130,00 | 118,00 | 4,60 | |
| V | 65,00 | 64,00 | 2,70 | |
| Y | 14,00 | 16,00 | 0,80 | |
| Zn | 26,00 | 28,00 | 1,30 | |
| Zr | 79,00 | 81,00 | 3,40 |
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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