METHODS FOR SAMPLING AND
INORGANIC ANALYSIS OF COAL
U.S. Geological Survey
Bulletin 1823
Edited by D.W. Golightly and F.O. Simon
Table 31. Pyritic sulfur in coal by direct method
| Pyritic Sulfur Concentration (percent) | ||||
| Standard | Measuredb | nb | ||
| 771 | 0.018 | ± | 0.003 | (3) |
| 772 | 0.017 | ± | 0.004 | (3) |
| 774 | 0.17 | (2) | ||
| 775 | 0.39 | (2) | ||
| 780 | 0.87 | (2) | ||
| 782 | 1.47 | (2) | ||
| aSource:
Standards are from Alpha Resources (1985). bPyritic sulfur concentrations measured in U.S. Geological Survey laboratories. Values shown for each coal standard are the arithmetic mean and standard deviation for n measurements, where n is the number in Parentheses. |
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