Round robin tests XRF-analysis XRF Round-robin test GeoPT 42, England - QS-1, Queenstone Shale
Study organized by:
International Association of Geoanalysts and Geostandards Newsletter - GeoPT42
Material of proficiency test:
QS-1, Queenstone Shale
Study finished:
2018 - 2
Literature:
Report - GeoPT42 Proficiency Testing Round 42 (Laborcode CRB = A20)
major elements [wt %]
| CRB | RV | 1sRV | Z-Score | |
| Na₂O | 0,110 | |||
| MgO | 3,620 | 3,630 | 0,099 | -0,080 |
| Al₂O₃ | 14,350 | 14,280 | 0,280 | 0,180 |
| SiO₂ | 51,140 | 50,920 | 0,669 | 0,200 |
| P₂O5 | 0,151 | 0,151 | 0,011 | -0,020 |
| K₂O | 4,410 | 4,414 | 0,109 | -0,020 |
| CaO | 8,140 | 8,068 | 0,206 | 0,310 |
| TiO₂ | 0,765 | 0,758 | 0,023 | 0,210 |
| Fe₂O₃tot | 6,440 | 6,486 | 0,162 | -0,240 |
| MnO | 0,101 | 0,100 | 0,004 | 0,180 |
| L.O.I. | 10,680 | 10,770 | 0,320 | -0,310 |
trace elements [µg/g]
| CRB | RV | 1sRV | Z-Score | |
| As | 5,00 | 6,90 | 2,20 | -2,26 |
| Ba | 360,00 | 362,10 | 16,10 | -0,09 |
| Ce | 81,00 | 81,10 | 5,60 | -0,01 |
| Co | 12,00 | 16,00 | 2,40 | -2,37 |
| Cr | 69,00 | 70,50 | 9,10 | -0,26 |
| Cu | 13,00 | 11,40 | 2,90 | 1,27 |
| Ga | 20,00 | 19,70 | 1,70 | 0,15 |
| Hf | 4,40 | 4,24 | 0,60 | 0,29 |
| La | 31,00 | 39,40 | 3,70 | -2,32 |
| Nb | 15,00 | 14,50 | 1,20 | 0,34 |
| Nd | 34,00 | 36,60 | 2,70 | -0,76 |
| Ni | 34,00 | 38,40 | 4,30 | -1,24 |
| Pb | 17,00 | 9,30 | 1,60 | 7,21 |
| Pr | 7,00 | 9,60 | 0,60 | -2,38 |
| Rb | 135,00 | 135,50 | 7,40 | -0,05 |
| Sc | 15,00 | 14,20 | 2,20 | 0,50 |
| Sm | 6,00 | 7,10 | 0,60 | -1,28 |
| Sr | 108,00 | 113,00 | 5,40 | -0,56 |
| Tl | 0,50 | 0,70 | 0,10 | -1,39 |
| V | 112,00 | 112,00 | 8,20 | 0,00 |
| Y | 32,00 | 29,20 | 2,50 | 1,00 |
| Zn | 75,00 | 75,00 | 6,90 | 0,00 |
| Zr | 156,00 | 159,30 | 12,50 | -0,28 |
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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