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2012 - XRF Round-robin test GeoPT31, England - SdAR-1, River Sediment
Organizer
International Association of Geoanalysts and Geostandards Newsletter - GeoPT31
Material
SdAR-1, (river sediment)
Literature
Report - GeoPT31 Proficiency Testing Round
Download
Major elements [wt %]
CRB
RV
1sRV
Z-Score
Na₂O
1.540
1.610
0.030
-1.160
MgO
0.810
0.790
0.017
-0.500
Al₂O₃
11.800
11.830
0.160
0.110
SiO₂
72.390
71.940
0.750
1.520
P₂O5
0.163
0.160
0.004
0.320
K₂O
3.660
3.630
0.060
0.230
CaO
0.800
0.799
0.017
0.040
TiO₂
0.622
0.628
0.074
-0.220
Fe₂O₃ tot
4.590
4.630
0.074
-0.270
MnO
0.690
0.698
0.015
-0.250
L.O.I.*
2.310
2.620
0.040
-3.420
Trace elements [µg/g]
CRB
RV
1sRV
Z-Score
As
38.00
36.40
1.70
0.46
Ba
785.00
794.00
23.30
-0.20
Bi
2.00
1.80
0.13
0.89
Br*
1.00
1.50
---
---
Cd
4.30
5.30
0.13
-4.52
Ce
109.00
111.00
4.30
-0.21
Co
11.00
10.70
0.60
0.24
Cr
98.00
92.70
3.80
0.71
Cu
309.00
302.00
10.20
0.34
F*
740.00
926.00
---
---
Ga
18.00
17.20
0.90
0.46
La
61.00
58.30
2.50
0.55
Mo
8.00
12.60
0.70
-3.30
Nb
32.00
34.70
1.60
-0.83
Nd
44.00
46.10
2.10
-0.50
Ni
30.00
40.80
1.90
-2.89
Pb
1,045.00
979.30
27.80
1.18
Pr
12.00
12.60
0.70
-0.40
Rb
145.00
142.80
5.40
0.21
S*
1,200.00
1,300.00
---
---
Sm
9.00
6.70
0.40
-1.54
Sr
150.00
152.00
5.70
-0.13
Th
13.00
18.00
0.90
-2.67
U
5.00
4.30
0.30
1.31
V
69.00
68.00
2.90
0.13
Y
37.00
40.90
1.90
-1.04
Zn
980.00
932.10
26.60
0.90
Zr
340.00
352.80
11.70
-0.55
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
