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2017 - XRF Round-robin test GeoPT 40A, England - ShTX-1, Calcearous organic-rich shale
Organizer
International Association of Geoanalysts and Geostandards Newsletter - GeoPT40A
Material
ShTX-1, Calcearous organic-rich shale
Literature
Report - GeoPT40A Proficiency Testing Round 40A (Laborcode CRB = X25)
Download
Major elements [wt %]
CRB
RV
1sRV
Z-Score
MgO
0.550
0.420
0.010
6.730
Al₂O₃
3.960
4.000
0.065
-0.310
SiO₂
25.000
25.130
0.309
-0.210
P₂O5
0.099
0.099
0.003
0.000
K₂O
0.330
0.337
0.008
-0.440
CaO
33.050
32.950
0.389
0.130
TiO₂
0.180
0.175
0.005
0.530
Fe₂O₃tot
1.620
1.612
0.030
0.130
MnO
0.013
0.011
0.001
1.940
L.O.I.
31.540
31.610
0.380
-0.110
TC
11.920
11.910
0.164
0.030
TOC*
5.330
4.950
0.580
Trace elements [µg/g]
CRB
RV
1sRV
Z-Score
As
15.00
15.10
0.80
0.03
Ba
59.00
73.00
3.10
-2.28
Ce
31.00
24.80
1.20
2.56
Cl *
130.00
94.00
41.00
Cr
25.00
29.70
1.40
-1.63
Cu
33.00
33.80
1.60
-0.26
F *
550.00
606.00
162.00
Ga
8.00
6.30
0.40
2.26
Hf
2.00
1.18
0.10
4.45
Nd
11.00
11.00
0.60
0.00
Ni
72.00
74.90
3.10
-0.47
Pb
10.00
6.10
0.40
5.35
Rb
12.00
16.90
0.90
-2.77
Sr
1,042.00
1,017.00
28.70
0.44
V
421.00
419.00
13.50
0.07
Y
10.00
9.60
0.50
0.37
Zn
97.00
97.80
3.90
-0.10
Zr
61.00
52.60
2.30
1.82
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
