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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 %]

CRBRV1sRVZ-Score
Na₂O0,110
MgO3,6203,6300,099-0,080
Al₂O₃14,35014,2800,2800,180
SiO₂51,14050,9200,6690,200
P₂O50,1510,1510,011-0,020
K₂O4,4104,4140,109-0,020
CaO8,1408,0680,2060,310
TiO₂0,7650,7580,0230,210
Fe₂O₃tot6,4406,4860,162-0,240
MnO0,1010,1000,0040,180
L.O.I.10,68010,7700,320-0,310

trace elements [µg/g]

CRBRV1sRVZ-Score
As5,006,902,20-2,26
Ba360,00362,1016,10-0,09
Ce81,0081,105,60-0,01
Co12,0016,002,40-2,37
Cr69,0070,509,10-0,26
Cu13,0011,402,901,27
Ga20,0019,701,700,15
Hf4,404,240,600,29
La31,0039,403,70-2,32
Nb15,0014,501,200,34
Nd34,0036,602,70-0,76
Ni34,0038,404,30-1,24
Pb17,009,301,607,21
Pr7,009,600,60-2,38
Rb135,00135,507,40-0,05
Sc15,0014,202,200,50
Sm6,007,100,60-1,28
Sr108,00113,005,40-0,56
Tl0,500,700,10-1,39
V112,00112,008,200,00
Y32,0029,202,501,00
Zn75,0075,006,900,00
Zr156,00159,3012,50-0,28

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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