Round robin tests XRF-analysis XRF Round-robin test GeoPT 41, England - ORA-1, Andesite
Study organized by:
International Association of Geoanalysts and Geostandards Newsletter - GeoPT41
Material of proficiency test:
ORA-1, Andesite
Study finished:
2017 - 7
Literature:
Report - GeoPT41 Proficiency Testing Round 41 (Laborcode CRB = Y66)
major elements [wt %]
| CRB | RV | 1sRV | Z-Score | |
| Na₂O | 4,270 | 4,200 | 0,068 | 0,550 |
| MgO | 3,250 | 3,190 | 0,053 | 0,580 |
| Al₂O₃ | 17,500 | 17,500 | 0,228 | 0,000 |
| SiO₂ | 60,160 | 60,480 | 0,652 | -0,250 |
| P₂O5 | 0,172 | 0,173 | 0,005 | -0,160 |
| K₂O | 1,240 | 1,239 | 0,024 | 0,030 |
| CaO | 6,120 | 6,000 | 0,092 | 0,650 |
| TiO₂ | 0,860 | 0,850 | 0,017 | 0,890 |
| Fe₂O₃tot | 6,340 | 6,135 | 0,093 | 1,100 |
| MnO | 0,099 | 0,095 | 0,003 | 0,680 |
| L.O.I. * | - 0,180 | 0,000 | 0,120 | -0,780 |
| TC * [µg/g] | 272 | 221,000 | 72,000 | 0,350 |
trace elements [µg/g]
| CRB | RV | 1sRV | Z-Score | |
| Ba | 337,00 | 323,00 | 10,80 | 0,65 |
| Ce | 36,00 | 34,40 | 1,60 | 0,50 |
| Cl * | 95,00 | 102,00 | 46,00 | -0,08 |
| Co | 19,00 | 19,00 | 1,00 | 0,03 |
| Cr | 35,00 | 40,00 | 1,80 | -1,36 |
| Cu | 22,00 | 30,00 | 1,40 | -2,77 |
| Ga | 20,00 | 20,50 | 1,00 | -0,25 |
| Hf | 3,50 | 3,70 | 0,20 | -0,41 |
| La | 10,00 | 16,30 | 0,90 | -3,69 |
| Nb | 8,00 | 8,10 | 0,50 | -0,06 |
| Nd | 18,00 | 17,50 | 0,90 | 0,29 |
| Ni | 32,00 | 33,40 | 1,60 | -0,44 |
| Pb | 12,00 | 9,00 | 0,50 | 2,91 |
| Pr | 3,00 | 4,30 | 0,30 | -2,32 |
| Rb | 19,00 | 18,60 | 1,00 | 0,24 |
| Sm | 4,00 | 3,60 | 0,20 | 0,76 |
| Sr | 559,00 | 543,00 | 16,80 | 0,48 |
| V | 114,00 | 108,00 | 4,30 | 0,70 |
| Y | 16,00 | 15,20 | 0,80 | 0,48 |
| Zn | 60,00 | 66,90 | 2,80 | -1,21 |
| Zr | 143,00 | 146,00 | 5,50 | -0,27 |
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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