TABLE IV. Rotrode accuracy and repeatability limits.
Accuracy Index (AI)
Repeatability Index (RI)
900
0
5
10
30
50
80
100 120
300
500
700
900
0
5
10
30
50
80
100 120 300
500
700
Element
Al
0.6
0.9
2.1
3.3
4.5
5.7
7.5
9.3
33.0
45.0
57.0
69.0
0.5
0.6
0.7
1.5
2.5 3.5
5.0
8.0 15.0
25.0
35.0
45.0
Cr
0.6
0.9
2.1
3.3
4.5
5.7
7.2
8.7
33.0
45.0
57.0
69.0
0.5
0.6
0.7
1.5
2.5 3.5
5.0
8.0 15.0
25.0
35.0
45.0
Cu
0.8
1.2
2.1
4.5
7.1
9.6 13.7 17.7
45.0
70.0
95.0
120.0
0.5
0.7
1.0
2.7
4.5 6.5
9.0 11.0 27.0
45.0
63.0
81.0
Fe
0.8
1.2
2.1
3.9
6.3
8.7 12.0 15.3
39.0
63.0
87.0
111.0
0.5
0.6
0.9
2.4
4.0 6.0
8.0 10.0 24.0
40.0
56.0
72.0
Pb
1.2
1.5
2.1
3.3
5.0
6.6
9.2 11.7
33.0
50.0
67.0
84.0
0.9
1.0
1.0
2.0
3.1 4.5
6.0
9.0 18.0
30.0
42.0
54.0
Mg
0.8
1.2
2.1
4.5
7.1
9.6 13.7 17.7
45.0
70.0
95.0
120.0
0.5
1.0
1.6
4.8
8.0 8.5
9.0 11.0 27.0
45.0
63.0
81.0
Ni
0.6
0.9
2.1
3.3
4.5
5.7
7.5
9.3
33.0
45.0
57.0
69.0
0.5
0.6
0.7
1.5
2.5 3.5
5.0
8.0 15.0
25.0
35.0
45.0
Si
0.6
0.9
2.1
3.3
4.5
5.7
7.5
9.3
33.0
45.0
57.0
69.0
0.5
0.6
0.7
1.5
2.5 3.5
5.0
8.0 15.0
25.0
35.0
45.0
Ag
1.0
1.8
2.1
3.9
6.3
8.7 12.0 15.3
39.0
63.0
87.0
111.0
0.5
0.6
0.9
2.4
4.0 6.0
8.0 10.0 24.0
40.0
56.0
72.0
Na
0.8
2.0
3.3
8.7
14.1
19.5 28.5 37.5
87.0
140.0
193.0
246.0
0.5
1.0
1.6
4.8
8.0 12.0 16.0 20.0 48.0
80.0
112.0
144.0
Sn
1.2
1.5
2.1
3.3
5.0
6.6
9.2 11.7
33.0
50.0
67.0
84.0
0.5
1.0
1.0
2.0
3.1 4.5
6.0
9.0 18.0
30.0
42.0
54.0
Ti
0.6
0.9
2.1
3.3
4.7
6.0
8.7 11.4
33.0
47.0
61.0
75.0
0.5
0.6
0.7
1.8
3.0 4.3
6.0
9.0 18.0
30.0
42.0
54.0
B
0.6
0.9
2.1
3.3
4.7
6.0
8.7 11.4
33.0
47.0
61.0
75.0
0.5
0.6
0.7
1.8
3.0 4.3
6.0
9.0 18.0
30.0
42.0
54.0
Mo
0.8
1.2
2.1
3.9
6.3
8.7 12.0 15.3
39.0
63.0
87.0
111.0
0.5
0.6
0.9
2.4
4.0 5.5
8.0 10.0 24.0
40.0
56.0
72.0
Zn
0.8
1.5
2.4
6.2
9.9
13.7 19.5 25.4
62.0
99.0
136.0
173.0
0.5
0.8
1.3
3.6
6.0 9.0 12.0 18.0 36.0
60.0
84.0
108.0
Ba
0.8
1.2
2.1
3.9
6.3
8.7 12.0 15.3
39.0
63.0
87.0
111.0
0.5
0.6
0.7
1.8
3.0 4.5
6.0
9.0 18.0
30.0
42.0
54.0
Cd
0.8
1.2
2.1
3.9
6.3
8.7 12.0 15.3
39.0
63.0
87.0
111.0
0.5
0.6
0.7
1.8
3.0 4.5
6.0
9.0 18.0
30.0
42.0
54.0
Mn
0.8
1.2
2.1
3.9
6.3
8.7 12.0 15.3
39.0
63.0
87.0
111.0
0.5
0.6
0.7
1.8
3.0 4.5
6.0
9.0 18.0
30.0
42.0
54.0
V
0.8
1.2
2.1
3.9
6.3
8.7 12.0 15.3
39.0
63.0
87.0
111.0
0.8
0.6
0.9
1.8
3.0 4.5
6.0
9.0 18.0
30.0
42.0
54.0
Ca
0.5
1.2
1.5
3.3
5.5
8.3 10.0 12.6
32.0
53.0
73.9
95.0
0.5
0.6
0.8
1.8
2.8 3.5
3.8
4.1 10.0
20.0
29.8
40.0
P
4.4
6.0
7.5
15.5
18.2
19.4 20.0 21.6
35.0
60.0
82.3
105.0
1.1
1.5
1.9
5.5
7.5 9.3 10.0 12.5 15.0
25.0
32.6
40.0
Note: The column headings, 0, 5, 10, 30, 50, 80, 100, 120, 300, 500, 700 and 900 denote the nominal concentration in parts per
million (ppm).
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