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450000 ppm
430×103 ppm
55×103 ppm
20×103 ppm
18×103 ppm
6×103 ppm
5500 ppm
3.7×103 ppm
2×103 ppm
1.8×103 ppm
1400 ppm
1000 ppm
700 ppm
320 ppm to 700 ppm
230 ppm
60 ppm to 400 ppm
77 ppm
17 ppm to 50 ppm
15 ppm
13 ppm
1 ppm to 16 ppm
1.5 ppm to 15 ppm
8 ppm
5.4 ppm
5.3 ppm
0.3 ppm to 7 ppm
2.3 ppm
1.9 ppm
0.8 ppm to 2.5 ppm
1.5 ppm
1.3 ppm
0.81 ppm
0.77 ppm
0.66 ppm
0.1 ppm to 0.8 ppm
0.42 ppm
0.05 ppm to 0.6 ppm
0.04 ppm to 0.6 ppm
0.06 ppm to 0.5 ppm
0.1 ppm to 0.44 ppm
0.23 ppm
0.13 ppm
0.0017 ppm
Bowen, H. J. M. Environmental Chemistry of the Elements. London: Academic Press, Inc., 1979.
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