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2018 - XRF Round-robin test GeoPT 42, England - QS-1, Queenstone Shale
Organizer
International Association of Geoanalysts and Geostandards Newsletter - GeoPT42
Material
QS-1, Queenstone Shale
Literature
Report - GeoPT42 Proficiency Testing Round 42 (Laborcode CRB = A20)
Download
Major elements [wt %]
CRB
RV
1sRV
Z-Score
Na₂O
0.110
MgO
3.620
3.630
0.099
-0.080
Al₂O₃
14.350
14.280
0.280
0.180
SiO₂
51.140
50.920
0.669
0.200
P₂O5
0.151
0.151
0.011
-0.020
K₂O
4.410
4.414
0.109
-0.020
CaO
8.140
8.068
0.206
0.310
TiO₂
0.765
0.758
0.023
0.210
Fe₂O₃tot
6.440
6.486
0.162
-0.240
MnO
0.101
0.100
0.004
0.180
L.O.I.
10.680
10.770
0.320
-0.310
Trace elements [µg/g]
CRB
RV
1sRV
Z-Score
As
5.00
6.90
2.20
-2.26
Ba
360.00
362.10
16.10
-0.09
Ce
81.00
81.10
5.60
-0.01
Co
12.00
16.00
2.40
-2.37
Cr
69.00
70.50
9.10
-0.26
Cu
13.00
11.40
2.90
1.27
Ga
20.00
19.70
1.70
0.15
Hf
4.40
4.24
0.60
0.29
La
31.00
39.40
3.70
-2.32
Nb
15.00
14.50
1.20
0.34
Nd
34.00
36.60
2.70
-0.76
Ni
34.00
38.40
4.30
-1.24
Pb
17.00
9.30
1.60
7.21
Pr
7.00
9.60
0.60
-2.38
Rb
135.00
135.50
7.40
-0.05
Sc
15.00
14.20
2.20
0.50
Sm
6.00
7.10
0.60
-1.28
Sr
108.00
113.00
5.40
-0.56
Tl
0.50
0.70
0.10
-1.39
V
112.00
112.00
8.20
0.00
Y
32.00
29.20
2.50
1.00
Zn
75.00
75.00
6.90
0.00
Zr
156.00
159.30
12.50
-0.28
Legende
CRB
Interlaboratory test
1s-RV
Z-score
*
CRB Results
Interlaboratory Test Results
Standard Deviation Interlaboratory Test
Difference between the measured value and the average value of the interlaboratory test
Value not certified
