Round robin tests XRF-analysis XRF Round-robin test GeoPT13 - Loess
Study organized by:
nternational Association of Geoanalysts and Geostandards Newsletter - GeoPT13
Material of proficiency test:
Loess
Study finished:
2003 - 8
Literature:
Preliminary Report - GeoPT13 Proficiency Testing Round
major elements [wt %]
| CRB | RV | 1sRV | Z-Score | |
| Na₂O | 1,160 | 1,058 | 0,021 | --- |
| MgO | 2,950 | 2,900 | 0,049 | --- |
| Al₂O₃ | 6,120 | 6,200 | 0,094 | --- |
| SiO₂ | 53,410 | 53,240 | 0,560 | --- |
| P₂O5 | 0,145 | 0,130 | 0,004 | --- |
| K₂O | 1,360 | 1,300 | 0,025 | --- |
| CaO | 16,650 | 16,310 | 0,210 | --- |
| TiO₂ | 0,437 | 0,423 | 0,010 | --- |
| Fe₂O₃ tot | 2,130 | 2,100 | 0,038 | --- |
| MnO | 0,070 | 0,064 | 0,002 | --- |
trace elements [µg/g]
| CRB | RV | 1sRV | Z-Score | |
| Ba | 230,00 | 201,00 | 7,21 | --- |
| Ce | 47,00 | 53,00 | 2,32 | --- |
| Co | 10,00 | 5,95 | 0,36 | --- |
| Cr | 112,00 | 105,70 | 4,20 | --- |
| Cu | 12,00 | 11,31 | 0,63 | --- |
| Ga | 5,80 | 7,08 | 0,42 | --- |
| Hf | 8,00 | 9,10 | 0,52 | --- |
| Nb | 7,50 | 8,60 | 0,10 | --- |
| Ni | 23,00 | 23,30 | 1,20 | --- |
| Pb | 12,00 | 11,30 | 0,63 | --- |
| Rb | 53,00 | 51,20 | 2,33 | --- |
| Sr | 304,00 | 279,00 | 9,50 | --- |
| V | 46,00 | 37,60 | 2,45 | --- |
| Y | 47,00 | 47,10 | 1,74 | --- |
| Zn | 36,00 | 34,40 | 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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