Round robin tests XRF-analysis XRF Round-robin test GeoPT9 - OU-6, Penrhyn Slate
Study organized by:
International Association of Geoanalysts and Geostandards Newsletter - GeoPT9
Material of proficiency test:
OU-6, Penrhyn Slate
Study finished:
2001 - 8
Literature:
Preliminary Report - GeoPT9 Proficiency Testing Round
major elements [wt %]
| CRB | RV | 1sRV | Z-Score | |
| Na₂O | 1,690 | 1,770 | 0,030 | |
| MgO | 2,310 | 2,400 | 0,040 | |
| Al₂O₃ | 20,580 | 20,200 | 0,030 | |
| SiO₂ | 57,570 | 57,510 | 0,100 | |
| P₂O5 | 0,117 | 0,118 | 0,002 | |
| K₂O | 3,080 | 3,050 | 0,012 | |
| CaO | 0,740 | 0,740 | 0,005 | |
| TiO₂ | 1,010 | 0,998 | 0,004 | |
| Fe₂O₃ tot | 9,030 | 9,001 | 0,033 | |
| MnO | 0,284 | 0,284 | 0,001 |
trace elements [µg/g]
| CRB | RV | 1sRV | Z-Score | |
| As | 17,00 | 13,00 | 0,45 | |
| Ba | 491,00 | 477,00 | 4,80 | |
| Ce | 73,00 | 74,40 | 1,10 | |
| Co | 31,00 | 29,10 | 0,48 | |
| Cr | 54,00 | 70,00 | 1,39 | |
| Cu | 27,00 | 39,00 | 0,48 | |
| Ga | 27,00 | 24,30 | 0,29 | |
| Hf | 3,50 | 4,70 | 0,09 | |
| La | 66,00 | 33,00 | 0,51 | |
| Nb | 12,00 | 14,79 | 0,31 | |
| Nd | 24,00 | 29,01 | 0,52 | |
| Ni | 45,00 | 39,83 | 0,71 | |
| Pb | 19,00 | 28,00 | 0,50 | |
| Pr | 7,00 | 7,80 | 0,13 | |
| Rb | 119,00 | 120,20 | 0,90 | |
| Sm | 5,60 | 5,92 | 0,08 | |
| Sn | 4,40 | 2,70 | 0,11 | |
| Sr | 131,00 | 130,90 | 1,16 | |
| Th | 9,70 | 11,50 | 0,49 | |
| Tl | 0,50 | 0,53 | 0,02 | |
| U | 2,30 | 1,96 | 0,02 | |
| V | 127,00 | 129,40 | 1,63 | |
| Y | 26,00 | 27,35 | 0,47 | |
| Zn | 120,00 | 118,20 | 1,40 | |
| Zr | 169,00 | 174,10 | 1,60 |
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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