Round robin tests XRF-analysis XRF Round-robin test GeoPT 44, England - ShCX-1, Calcareous Shale
Study organized by:
International Association of Geoanalysts and Geostandards Newsletter - GeoPT44
Material of proficiency test:
ShCX-1, Calcareous Shale
Study finished:
2019 - 1
Literature:
Report - GeoPT44 Proficiency Testing Round 44 (Laborcode CRB = C85)
major elements [wt %]
| CRB | RV | 1sRV | Z-Score | |
| MgO | 0,560 | 0,490 | 0,011 | 3,210 |
| Al₂O₃ | 1,640 | 1,560 | 0,029 | 1,460 |
| SiO₂ | 7,770 | 7,830 | 0,115 | -0,240 |
| P₂O5 | 0,068 | 0,061 | 0,002 | 2,030 |
| K₂O | 0,470 | 0,460 | 0,010 | 0,480 |
| CaO | 48,100 | 47,600 | 0,532 | 0,470 |
| TiO₂ | 0,086 | 0,080 | 0,002 | 1,280 |
| Fe₂O₃tot | 0,950 | 0,955 | 0,020 | -0,140 |
| MnO | 0,027 | 0,023 | 0,001 | 2,460 |
| L.O.I. * | 39,930 | 40,120 | 0,460 | -0,210 |
| TC * | 12,400 | 12,400 | 0,170 | 0,000 |
| CO₂* | 37,200 | 37,200 | 0,432 | 0,000 |
trace elements [µg/g]
| CRB | RV | 1sRV | Z-Score | |
| Sr | 298,00 | 290,00 | 9,90 | 0,42 |
| V | 75,00 | 60,00 | 2,60 | 2,89 |
| Zn | 187,00 | 193,00 | 7,00 | -0,43 |
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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