Appendix b 
Analyses of GSR-3 standard by ICP-MS
(ppm)	Meas.	1σ	RSD	Ref.	RE(%)	(ppm)	Meas.	1σ	RSD	Ref.	RE(%)	
	N=2		(%)		(%)		N=2		(%)		(%)	
Cr
Co
Ni
Rb
Sr
Y
Zr
Nb
Ba
La
Ce
Pr
Nd
Sm	133
47.3
138
38.1
1147
21.6
276
69.7
542
54.0
103
12.8
52.0
10.1	16
5.2
11
6.0
100
5.0
30
12.1
40
7.5
12
1.6
5.0
0.70	1.5
1.3
4.0
5.3
3.0
4.1
2.7
3.2
1.8
3.2
0.3
0.9
0.4
1.3	134
46.5
140
37
1100
22
277
68
527
56
105
13.2
54
10.2	-0.33
-1.71
1.33
-2.87
-4.28
2.07
0.37
-2.53
-3.11
2.42
2.30
3.36
3.71
-1.30	Eu
Gd
Tb
Dy
Ho
Er
Tm
Yb
Lu
Hf
Ta
Pb
Th
U	3.27
8.86
1.23
5.72
0.89
2.08
0.27
1.43
0.19
6.52
4.50
4.81
6.09
1.46	0.31
0.70
0.22
0.36
0.10
0.34
0.10
0.52
0.10
0.81
0.62
4.02
1.23
0.50	3.5
4.9
3.5
2.9
4.6
3.7
3.5
0.1
1.1
0.9
0.9
1.1
1.3
0.6	3.2
8.5
1.2
5.6
0.88
2
0.28
1.5
0.19
6.5
4.3
4.7
6
1.4	-2.28
-4.26
-2.25
-2.15
-1.25
-4.13
2.32
5.10
1.31
-0.39
-4.68
-2.31
-1.49
-4.34	
n: number of analyses; Meas: measured value; RSD: relative standard deviation; Ref.: reference value; RE: relative error between measured and recommended values.